1 /* $NetBSD: z8530var.h,v 1.2 1999/07/03 08:22:56 dbj Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)zsvar.h 8.1 (Berkeley) 6/11/93 45 */ 46 47 #define splzs() splserial() 48 49 #include <dev/ic/z8530sc.h> 50 51 struct zsc_softc { 52 struct device zsc_dev; /* required first: base device */ 53 struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */ 54 /* Machine-dependent part follows... */ 55 struct evcnt zsc_intrcnt; /* count interrupts */ 56 struct zs_chanstate zsc_cs_store[2]; 57 }; 58 59 /* 60 * Functions to read and write individual registers in a channel. 61 * The ZS chip requires a 1.6 uSec. recovery time between accesses. 62 * On the SparcStation the recovery time is handled in hardware. 63 * On the older Sun4 machine it isn't, and software must do it. 64 * 65 * However, it *is* a problem on some Sun4m's (i.e. the SS20) (XXX: why?). 66 * Thus we leave in the delay (done in the functions below). 67 * XXX: (ABB) Think about this more. 68 * 69 * The functions below could be macros instead if we are concerned 70 * about the function call overhead where ZS_DELAY does nothing. 71 */ 72 73 u_char zs_read_reg __P((struct zs_chanstate *cs, u_char reg)); 74 u_char zs_read_csr __P((struct zs_chanstate *cs)); 75 u_char zs_read_data __P((struct zs_chanstate *cs)); 76 77 void zs_write_reg __P((struct zs_chanstate *cs, u_char reg, u_char val)); 78 void zs_write_csr __P((struct zs_chanstate *cs, u_char val)); 79 void zs_write_data __P((struct zs_chanstate *cs, u_char val)); 80 81 /* The sparc has splzs() in psl.h */ 82 83 /* We want to call it "zs" instead of "zsc" (sigh). */ 84 #ifndef ZSCCF_CHANNEL 85 #define ZSCCF_CHANNEL 0 86 #define ZSCCF_CHANNEL_DEFAULT -1 87 #endif 88