76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
/* $NetBSD: lptreg.h,v 1.3 1995/05/16 07:30:35 phil Exp $ */
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/*
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* Copyright (c) 1994 Matthias Pfaller.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Matthias Pfaller.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* lptreg.h: definitions for the lpt driver.
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*
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*/
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struct i8255 {
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unsigned char port_a; /* Port A data (r/w) */
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unsigned char port_b; /* Port B data (r/w) */
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unsigned char port_c; /* Port C data (r/w) */
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unsigned char port_control; /* Port control (-/w) */
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};
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/* port_a */
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#define LPA_ALF 0x01
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#define LPA_SELECT 0x02
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#define LPA_NPRIME 0x04
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#define LPA_ACKENABLE 0x08 /* Enable Ack interrupts */
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#define LPA_ACTIVE 0x10 /* Device active led */
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/* port_c */
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#define LPC_IRQ 0x01
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#define LPC_NSTROBE 0x02
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#define LPC_NBUSY 0x08 /* Negative logic! */
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#define LPC_NERROR 0x10
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#define LPC_ONLINE 0x20
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#define LPC_NOPAPER 0x40
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#define LPC_NACK 0x80
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/* port_control */
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#define LPT_PROBE_MODE 0x8c
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#define LPT_MODE 0x8d /* Port A: Output, Mode 0 */
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/* Port B: Output, Mode 1 */
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/* Port C: Input */
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#define LPT_IRQENABLE 0x05 /* Enable LPT interrupts */
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#define LPT_IRQDISABLE 0x04 /* Disable LPT interrupts */
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#define LPT_PROBE_MASK 0x08
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#define LPT_PROBE_SET 0x07
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#define LPT_PROBE_CLR 0x06
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/* Default mapped address */
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#define LPT_ADR(unit) (((volatile struct i8255 *)0xFFC80030) + unit)
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/* Default interrupts */
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#define LPT_IRQ(unit) (unit?IR_TTY3 - 1:IR_TTY3)
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#define LPT_MAX 2 /* Maximum number of lpt interfaces*/
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