1 /* $NetBSD: z8530var.h,v 1.5 2000/12/08 09:42:44 nisimura Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Gordon W. Ross 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 /* 49 * XXX XXX XXX THIS DOES NOT WORK WITH MULTIPLE ATTACHMENTS!!! XXX XXX XXX 50 */ 51 52 #include <dev/ic/z8530sc.h> 53 54 struct zsc_softc { 55 struct device zsc_dev; /* required first: base device */ 56 struct zs_chanstate *zsc_cs[2]; /* channel A and B soft state */ 57 /* Machine-dependent part follows... */ 58 int zsc_addroffset; /* used as "cookie" to identify scc */ 59 void *zsc_sih; 60 }; 61 62 /* 63 * Functions to read and write individual registers in a channel. 64 * The ZS chip requires a 1.6 uSec. recovery time between accesses, 65 * and the Alpha TC hardware does NOT take care of this for you. 66 * The delay is now handled inside the chip access functions. 67 * These could be inlines, but with the delay, speed is moot. 68 */ 69 70 u_int zs_read_reg(struct zs_chanstate *cs, u_int reg); 71 u_int zs_read_csr(struct zs_chanstate *cs); 72 u_int zs_read_data(struct zs_chanstate *cs); 73 74 void zs_write_reg(struct zs_chanstate *cs, u_int reg, u_int val); 75 void zs_write_csr(struct zs_chanstate *cs, u_int val); 76 void zs_write_data(struct zs_chanstate *cs, u_int val); 77 78 /* Interrupt priority for the SCC chip; needs to match ZSHARD_PRI. */ 79 #define splzs() spltty() 80