/* $NetBSD: pi1ppcreg.h,v 1.2 2009/03/05 01:38:12 msaitoh Exp $ */

/* $NetBSD: pi1ppcreg.h,v 1.2 2009/03/05 01:38:12 msaitoh Exp $ */

/*-
* Copyright (c) 2001 Alcove - Nicolas Souchu
* Copyright (c) 2005 Joe Britt <[email protected]> - SGI PI1 version
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* FreeBSD: src/sys/isa/ppcreg.h,v 1.10.2.4 2001/10/02 05:21:45 nsouch Exp
*
*/

#ifndef __PI1PPCREG_H
#define __PI1PPCREG_H

/* see iocreg.h for data/ctl/status reg offsets */

/* SPP mode control register bit positions. */
#define STROBE 0x01
#define AUTOFEED 0x02
#define nINIT 0x04
#define SELECTIN 0x08

/* we emulate this bit */
#define IRQENABLE 0x10

/* data dir in PS/2 mode */
#define PCD 0x20

/* SPP status register bit positions. */
/* #define TIMEOUT 0x01 */

#define nFAULT 0x08
#define SELECT 0x10
#define PERROR 0x20
#define nACK 0x40
#define nBUSY 0x80

/* Flags indicating ready condition */
#define SPP_READY (SELECT | nFAULT | nBUSY)
#define SPP_MASK (SELECT | nFAULT | PERROR | nBUSY)

/* Byte mode signals */
#define HOSTCLK STROBE
#define HOSTBUSY AUTOFEED
#define ACTIVE1284 SELECTIN
#define PTRCLK nACK
#define PTRBUSY nBUSY
#define ACKDATAREQ PERROR
#define XFLAG SELECT
#define nDATAVAIL nFAULT

/* interrupt mask & status bit positions */

/* these interrupts are asserted on rising AND falling edges */
#define PI1_PLP_PERROR_INTR 0x80
#define PI1_PLP_FAULT_INTR 0x40
#define PI1_PLP_SELECT_INTR 0x20

/* this interrupt is only asserted on rising edge */
#define PI1_PLP_ACK_INTR 0x04

#endif /* __PI1PPCREG_H */