/* $NetBSD: tms9914reg.h,v 1.2 2008/04/28 20:23:51 martin Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gregory McGarry.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define TMS9914_ISR0 0 /* (R) interrupt status 0 */
#define ISR0_MAC 0x01 /* my address change */
#define ISR0_RLC 0x02 /* remote/local address change */
#define ISR0_SPAS 0x04 /* serial poll active state */
#define ISR0_END 0x08 /* EOI or EOS */
#define ISR0_BO 0x10 /* byte out */
#define ISR0_BI 0x20 /* byte in */
#define TMS9914_ISR1 1 /* (R) interrupt status 1 */
#define ISR1_IFC 0x01 /* IFC asserted */
#define ISR1_SRQ 0x02 /* SRQ asserted */
#define ISR1_MA 0x04 /* my address */
#define ISR1_DCAS 0x08 /* device clear active state */
#define ISR1_APT 0x10 /* address pass-through */
#define ISR1_UCG 0x20 /* unrecognised command */
#define ISR1_ERR 0x40 /* data transmission error */
#define ISR1_GET 0x80 /* group execute trigger */
#define TMS9914_ADSR 2 /* (R) address status */
#define ADSR_ULPA 0x01 /* store last address LSB */
#define ADSR_TADS 0x02 /* talker addressed */
#define ADSR_LADS 0x04 /* listener addressed */
#define ADSR_TPAS 0x08 /* talker primary address state */
#define ADSR_LPAS 0x10 /* listener primary address state */
#define ADSR_ATN 0x20 /* ATN active */
#define ADSR_LLO 0x40 /* LLO active */
#define ADSR_REM 0x80 /* REM active */
#define TMS9914_CPTR 6 /* (R) command pass-through */
#define TMS9914_DIR 7 /* (R) data-in register */
/*
* Auxiliary Commands
*
* Two basic type of commands are implemented: pulsed and static.
* Static commands enable (set) or disable (clear) chip features.
* Pulsed commands stay active for one clock pulse.
*
*/
/* pulsed commands */
#define AUXCMD_RHDF 0x02 /* release RFD holdoff */
#define AUXCMD_NBAF 0x05 /* new byte available false */
#define AUXCMD_SEOI 0x08 /* send EOI with next byte */
#define AUXCMD_GTS 0x0b /* go to standby (clear ATN line) */
#define AUXCMD_TCA 0x0c /* take control (async) */
#define AUXCMD_TCS 0x0d /* take control (sync) */
/* static commands */
#define AUXCMD_SET 0x80
#define AUXCMD_CLEAR 0x00
#define AUXCMD_SWRST 0x00 /* Software reset */
#define AUXCMD_HDFA 0x03 /* holdoff on all data */
#define AUXCMD_HDFE 0x04 /* holdoff on EOI data only */
#define AUXCMD_RTL 0x07 /* return to local */
#define AUXCMD_LON 0x09 /* listen only */
#define AUXCMD_TON 0x0a /* talk only */
#define AUXCMD_RPP 0x0e /* request parallel poll */
#define AUXCMD_SIC 0x0f /* IFC (interface clear) line */
#define AUXCMD_SRE 0x10 /* REN (remote enable) line */
#define AUXCMD_DAI 0x13 /* interrupt disable */
#define AUXCMD_STD1 0x15 /* 1200ns T1 delay */
#define AUXCMD_SHDW 0x16 /* shadow handshake */
#define AUXCMD_VSTD1 0x17 /* 600ns T1 delay */
