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/* $NetBSD: lptreg.h,v 1.3 1995/05/16 07:30:35 phil Exp $ */
/*
* Copyright (c) 1994 Matthias Pfaller.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Matthias Pfaller.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
* lptreg.h: definitions for the lpt driver.
*
*/
struct i8255 {
unsigned char port_a; /* Port A data (r/w) */
unsigned char port_b; /* Port B data (r/w) */
unsigned char port_c; /* Port C data (r/w) */
unsigned char port_control; /* Port control (-/w) */
};
/* port_a */
#define LPA_ALF 0x01
#define LPA_SELECT 0x02
#define LPA_NPRIME 0x04
#define LPA_ACKENABLE 0x08 /* Enable Ack interrupts */
#define LPA_ACTIVE 0x10 /* Device active led */
/* port_c */
#define LPC_IRQ 0x01
#define LPC_NSTROBE 0x02
#define LPC_NBUSY 0x08 /* Negative logic! */
#define LPC_NERROR 0x10
#define LPC_ONLINE 0x20
#define LPC_NOPAPER 0x40
#define LPC_NACK 0x80
/* port_control */
#define LPT_PROBE_MODE 0x8c
#define LPT_MODE 0x8d /* Port A: Output, Mode 0 */
/* Port B: Output, Mode 1 */
/* Port C: Input */
#define LPT_IRQENABLE 0x05 /* Enable LPT interrupts */
#define LPT_IRQDISABLE 0x04 /* Disable LPT interrupts */
#define LPT_PROBE_MASK 0x08
#define LPT_PROBE_SET 0x07
#define LPT_PROBE_CLR 0x06
/* Default mapped address */
#define LPT_ADR(unit) (((volatile struct i8255 *)0xFFC80030) + unit)
/* Default interrupts */
#define LPT_IRQ(unit) (unit?IR_TTY3 - 1:IR_TTY3)
#define LPT_MAX 2 /* Maximum number of lpt interfaces*/
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