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z8530var.h revision 1.4 
      1 /*	$NetBSD: z8530var.h,v 1.4 2001/12/15 11:17:03 wdk 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 #include <machine/bus.h>
     49 #include <dev/ic/z8530sc.h>
     50 
     51 struct zs_channel {
     52 	struct zs_chanstate	cs_zscs; 	/* Required: soft state */
     53 	bus_space_tag_t		cs_bustag;	/* Machine-dependent */
     54 	bus_space_handle_t	cs_regs;
     55 };
     56 
     57 struct zsc_softc {
     58 	struct	device		zsc_dev;	/* required: base device */
     59 	struct	zs_chanstate   *zsc_cs[2];	/* channel soft state */
     60 	struct  zs_channel	zsc_cs_store[2];
     61 	/* Machine-dependent part follows... */
     62 	bus_space_tag_t		zsc_bustag;	/* Bus type */
     63 	bus_space_handle_t	zsc_base; 	/* Device base address */
     64         struct  evcnt		zs_intrcnt; 	/* Interrupt counter */
     65 	void		       *sc_si;		/* Softinterrupt handle */
     66 };
     67 
     68 /*
     69  * Functions to read and write individual registers in a channel.
     70  * The SCC chip requires 3-4 PCLK cycles recovery time between accesses
     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 /* Zilog Serial hardware interrupts (level 0) */
     82 #define splzs()		spltty()
     83 
     84 #if defined(_KERNEL) && defined(KGDB)
     85 void zs_kgdb_init __P((void));
     86 void zskgdb __P((struct zs_chanstate *));
     87 #endif
     88