1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (C) 1995 by Pavel Antonov, Moscow, Russia. 5 * Copyright (C) 1995 by Andrey A. Chernov, Moscow, Russia. 6 * All rights reserved. 7 * Copyright (C) 2002 by John Baldwin <jhb@FreeBSD.org> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33/* 34 * Cirrus Logic CD180 -based RISCom/8 board definitions 35 */ 36 37/* Oscillator frequency - 19660.08Mhz / 2 */ 38#define RC_OSCFREQ 9830400 39 40#define RC_BRD(s) ((s) == 0 ? 0 : \ 41 (((RC_OSCFREQ + (s) / 2) / (s)) + CD180_CTICKS/2) / CD180_CTICKS) 42 43/* Riscom/8 board ISA I/O mapping */ 44#define RC_IOMAP(r) ((((r) & 07) << 1) | (((r) & ~07) << 7)) 45 46/* I/O commands */ 47#define RC_OUT(sc, addr, value) \ 48 bus_space_write_1((sc)->sc_bt, (sc)->sc_bh, RC_IOMAP(addr), (value)) 49#define RC_IN(sc, addr) \ 50 bus_space_read_1((sc)->sc_bt, (sc)->sc_bh, RC_IOMAP(addr)) 51 52/* Riscom on-board registers (mapping assumed) */ 53#define RC_RIREG 0x100 /* Ring Indicator Register (read-only) */ 54#define RC_DTREG 0x100 /* DTR Register (write-only) */ 55#define RC_BSR 0x101 /* Board Status Register (read-only) */ 56#define RC_CTOUT 0x101 /* Clear Timeout (write-only) */ 57 58/* Board Status Register */ 59#define RC_BSR_TOUT 0x08 /* Timeout */ 60#define RC_BSR_RXINT 0x04 /* Receiver Interrupt */ 61#define RC_BSR_TXINT 0x02 /* Transmitter Interrupt */ 62#define RC_BSR_MOINT 0x01 /* Modem Control Interrupt */ 63 64/* Interrupt groups */ 65#define RC_MODEMGRP 0x01 /* Modem interrupt group */ 66#define RC_RXGRP 0x02 /* Receiver interrupt group */ 67#define RC_TXGRP 0x04 /* Transmitter interrupt group */ 68 69/* Priority Interrupt Level definitions */ 70#define RC_PILR_MODEM (0x80 | RC_MODEMGRP) 71#define RC_PILR_RX (0x80 | RC_RXGRP ) 72#define RC_PILR_TX (0x80 | RC_TXGRP ) 73