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z8530var.h revision 1.2 
      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