sys/arch/alpha/include/z8530var.h

   1 /* $NetBSD: z8530var.h,v 1.8 2007/11/07 15:56:11 ad 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. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      @(#)zsvar.h     8.1 (Berkeley) 6/11/93
  41  */
  42
  43 /*
  44  * Copyright (c) 1994 Gordon W. Ross
  45  *
  46  * This software was developed by the Computer Systems Engineering group
  47  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  48  * contributed to Berkeley.
  49  *
  50  * All advertising materials mentioning features or use of this software
  51  * must display the following acknowledgement:
  52  *      This product includes software developed by the University of
  53  *      California, Lawrence Berkeley Laboratory.
  54  *
  55  * Redistribution and use in source and binary forms, with or without
  56  * modification, are permitted provided that the following conditions
  57  * are met:
  58  * 1. Redistributions of source code must retain the above copyright
  59  *    notice, this list of conditions and the following disclaimer.
  60  * 2. Redistributions in binary form must reproduce the above copyright
  61  *    notice, this list of conditions and the following disclaimer in the
  62  *    documentation and/or other materials provided with the distribution.
  63  * 3. All advertising materials mentioning features or use of this software
  64  *    must display the following acknowledgement:
  65  *      This product includes software developed by the University of
  66  *      California, Berkeley and its contributors.
  67  * 4. Neither the name of the University nor the names of its contributors
  68  *    may be used to endorse or promote products derived from this software
  69  *    without specific prior written permission.
  70  *
  71  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  72  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  73  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  74  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  75  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  76  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  77  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  78  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  79  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  80  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  81  * SUCH DAMAGE.
  82  *
  83  *      @(#)zsvar.h     8.1 (Berkeley) 6/11/93
  84  */
  85
  86 /*
  87  * XXX XXX XXX THIS DOES NOT WORK WITH MULTIPLE ATTACHMENTS!!! XXX XXX XXX
  88  */
  89
  90 #include <dev/ic/z8530sc.h>
  91
  92 struct zsc_softc {
  93         device_t zsc_dev;               /* required first: base device */
  94         struct  zs_chanstate *zsc_cs[2];        /* channel A and B soft state */
  95         /* Machine-dependent part follows... */
  96         int zsc_addroffset;     /* used as "cookie" to identify scc */
  97         void *zsc_sih;
  98 };
  99
 100 /*
 101  * Functions to read and write individual registers in a channel.
 102  * The ZS chip requires a 1.6 uSec. recovery time between accesses,
 103  * and the Alpha TC hardware does NOT take care of this for you.
 104  * The delay is now handled inside the chip access functions.
 105  * These could be inlines, but with the delay, speed is moot.
 106  */
 107
 108 u_int zs_read_reg(struct zs_chanstate *cs, u_int reg);
 109 u_int zs_read_csr(struct zs_chanstate *cs);
 110 u_int zs_read_data(struct zs_chanstate *cs);
 111
 112 void  zs_write_reg(struct zs_chanstate *cs, u_int reg, u_int val);
 113 void  zs_write_csr(struct zs_chanstate *cs, u_int val);
 114 void  zs_write_data(struct zs_chanstate *cs, u_int val);
 115
 116 /* Interrupt priority for the SCC chip; needs to match ZSHARD_PRI. */
 117 #define splzs()         spltty()
 118 #define IPL_ZS          IPL_TTY