z8530var.h revision 1.2
1/* $OpenBSD: z8530var.h,v 1.2 2001/08/20 20:23:52 jason Exp $ */ 2/* $NetBSD: z8530var.h,v 1.4 2000/11/08 23:41:42 eeh Exp $ */ 3 4/* 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This software was developed by the Computer Systems Engineering group 9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 10 * contributed to Berkeley. 11 * 12 * All advertising materials mentioning features or use of this software 13 * must display the following acknowledgement: 14 * This product includes software developed by the University of 15 * California, Lawrence Berkeley Laboratory. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. All advertising materials mentioning features or use of this software 26 * must display the following acknowledgement: 27 * This product includes software developed by the University of 28 * California, Berkeley and its contributors. 29 * 4. Neither the name of the University nor the names of its contributors 30 * may be used to endorse or promote products derived from this software 31 * without specific prior written permission. 32 * 33 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 36 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 43 * SUCH DAMAGE. 44 * 45 * @(#)zsvar.h 8.1 (Berkeley) 6/11/93 46 */ 47 48#include <machine/bus.h> 49#include <dev/ic/z8530sc.h> 50 51/* 52 * Need to override cn_console_dev() for zstty and zskbd. 53 */ 54#ifdef cn_isconsole 55#undef cn_isconsole 56#endif 57extern struct consdev *cn_hw; 58extern struct consdev *cn_tab; 59#define cn_isconsole(d) ((d) == cn_tab->cn_dev || (d) == cn_hw->cn_dev) 60 61struct zsc_softc { 62 struct device zsc_dev; /* base device */ 63 bus_space_tag_t zsc_bustag; /* bus space/dma tags */ 64 bus_dma_tag_t zsc_dmatag; 65 struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */ 66 67 /* Machine-dependent part follows... */ 68 void *zsc_softintr; 69 int zsc_promunit; /* PROM's view of zs devices */ 70 int zsc_node; /* PROM node, if any */ 71 struct evcnt zsc_intrcnt; /* count interrupts */ 72 struct zs_chanstate zsc_cs_store[2]; 73}; 74 75/* 76 * Functions to read and write individual registers in a channel. 77 * The ZS chip requires a 1.6 uSec. recovery time between accesses. 78 * On the SparcStation the recovery time is handled in hardware. 79 * On the older Sun4 machine it isn't, and software must do it. 80 * 81 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?). 82 * Thus we leave in the delay (done in the functions below). 83 * XXX: (ABB) Think about this more. 84 * 85 * The functions below could be macros instead if we are concerned 86 * about the function call overhead where ZS_DELAY does nothing. 87 */ 88 89u_char zs_read_reg __P((struct zs_chanstate *cs, u_char reg)); 90u_char zs_read_csr __P((struct zs_chanstate *cs)); 91u_char zs_read_data __P((struct zs_chanstate *cs)); 92 93void zs_write_reg __P((struct zs_chanstate *cs, u_char reg, u_char val)); 94void zs_write_csr __P((struct zs_chanstate *cs, u_char val)); 95void zs_write_data __P((struct zs_chanstate *cs, u_char val)); 96 97/* The sparc has splzs() in psl.h */ 98 99/* We want to call it "zs" instead of "zsc" (sigh). */ 100#ifndef ZSCCF_CHANNEL 101#define ZSCCF_CHANNEL 0 102#define ZSCCF_CHANNEL_DEFAULT -1 103#endif 104