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/* ps2kbd.h -- Very simple PS/2 keyboard simulation header file

   Copyright (C) 2002 Marko Mlinar, markom@opencores.org

This file is part of OpenRISC 1000 Architectural Simulator.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 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 General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#ifndef _PS2KBD_H_

#define _PS2KBD_H_

/* Device registers */

#define KBD_CTRL        4

#define KBD_DATA        0

#define KBD_SPACE       8

/* Keyboard commands */

#define KBD_KCMD_RST    0xFF

#define KBD_KCMD_DK     0xF5

#define KBD_KCMD_EK     0xF4

#define KBD_KCMD_ECHO   0xFF

#define KBD_KCMD_SRL    0xED

/* Keyboard responses */

#define KBD_KRESP_RSTOK 0xAA

#define KBD_KRESP_ECHO  0xEE

#define KBD_KRESP_ACK   0xFA

/* Controller commands */

#define KBD_CCMD_RCB    0x20

#define KBD_CCMD_WCB    0x60

#define KBD_CCMD_ST1    0xAA

#define KBD_CCMD_ST2    0xAB

#define KBD_CCMD_DKI    0xAD

#define KBD_CCMD_EKI    0xAE

/* Status register bits */

#define KBD_STATUS_OBF  0x01

#define KBD_STATUS_IBF  0x02

#define KBD_STATUS_SYS  0x04

#define KBD_STATUS_A2   0x08

#define KBD_STATUS_INH  0x10

#define KBD_STATUS_MOBF 0x20

#define KBD_STATUS_TO   0x40

#define KBD_STATUS_PERR 0x80

/* Command byte register bits */

#define KBD_CCMDBYTE_INT        0x01

#define KBD_CCMDBYTE_INT2       0x02

#define KBD_CCMDBYTE_SYS        0x04

#define KBD_CCMDBYTE_EN         0x10

#define KBD_CCMDBYTE_EN2        0x20

#define KBD_CCMDBYTE_XLAT       0x40

/* Length of internal scan code fifo */

#define KBD_MAX_BUF     0x100

/* Keyboard is checked every KBD_SLOWDOWN cycle */

#define KBD_BAUD_RATE   1200

void kbd_reset();

void kbd_info();

#endif /* !_PS2KBD_H_ */