sys/arch/pmax/include/z8530var.h

   1 /* $NetBSD: z8530var.h,v 1.4 2007/11/07 15:56:13 ad 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         device_t 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 #define IPL_ZS          IPL_TTY