sys/arch/hp300/stand/common/dca.c

   1 /*      $NetBSD: dca.c,v 1.1.60.4 2005/03/04 16:38:26 skrll Exp $       */
   2
   3 /*
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      @(#)dca.c       8.1 (Berkeley) 6/10/93
  36  */
  37 /*
  38  * Copyright (c) 1988 University of Utah.
  39  *
  40  * This code is derived from software contributed to Berkeley by
  41  * the Systems Programming Group of the University of Utah Computer
  42  * Science Department.
  43  *
  44  * Redistribution and use in source and binary forms, with or without
  45  * modification, are permitted provided that the following conditions
  46  * are met:
  47  * 1. Redistributions of source code must retain the above copyright
  48  *    notice, this list of conditions and the following disclaimer.
  49  * 2. Redistributions in binary form must reproduce the above copyright
  50  *    notice, this list of conditions and the following disclaimer in the
  51  *    documentation and/or other materials provided with the distribution.
  52  * 3. All advertising materials mentioning features or use of this software
  53  *    must display the following acknowledgement:
  54  *      This product includes software developed by the University of
  55  *      California, Berkeley and its contributors.
  56  * 4. Neither the name of the University nor the names of its contributors
  57  *    may be used to endorse or promote products derived from this software
  58  *    without specific prior written permission.
  59  *
  60  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  61  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  62  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  63  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  64  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  65  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  66  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  67  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  68  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  69  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  70  * SUCH DAMAGE.
  71  *
  72  *      @(#)dca.c       8.1 (Berkeley) 6/10/93
  73  */
  74
  75 #ifdef DCACONSOLE
  76 #include <sys/param.h>
  77 #include <dev/cons.h>
  78
  79 #include <hp300/stand/common/dcareg.h>
  80 #include <hp300/stand/common/consdefs.h>
  81 #include <hp300/stand/common/samachdep.h>
  82
  83 /* If not using 4.4 devs */
  84 #ifndef dca_reset
  85 #define dca_id dca_irid
  86 #define dca_reset dca_id
  87 #endif
  88
  89 struct dcadevice *dcacnaddr = 0;
  90
  91 #define DCACONSCODE     9       /* XXX */
  92
  93 void
  94 dcaprobe(struct consdev *cp)
  95 {
  96         struct dcadevice *dca;
  97
  98         dcacnaddr = (struct dcadevice *) sctoaddr(DCACONSCODE);
  99         if (badaddr((char *)dcacnaddr)) {
 100                 cp->cn_pri = CN_DEAD;
 101                 return;
 102         }
 103 #ifdef FORCEDCACONSOLE
 104         cp->cn_pri = CN_REMOTE;
 105 #else
 106         dca = dcacnaddr;
 107         switch (dca->dca_id) {
 108         case DCAID0:
 109         case DCAID1:
 110                 cp->cn_pri = CN_NORMAL;
 111                 break;
 112         case DCAREMID0:
 113         case DCAREMID1:
 114                 cp->cn_pri = CN_REMOTE;
 115                 break;
 116         default:
 117                 cp->cn_pri = CN_DEAD;
 118                 break;
 119         }
 120
 121 #endif
 122         curcons_scode = DCACONSCODE;
 123 }
 124
 125 void
 126 dcainit(struct consdev *cp)
 127 {
 128         struct dcadevice *dca = dcacnaddr;
 129
 130         dca->dca_reset = 0xFF;
 131         DELAY(100);
 132         dca->dca_ic = 0;
 133         dca->dca_cfcr = CFCR_DLAB;
 134         dca->dca_data = DCABRD(9600) & 0xFF;
 135         dca->dca_ier = DCABRD(9600) >> 8;
 136         dca->dca_cfcr = CFCR_8BITS;
 137         dca->dca_fifo =
 138             FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1;
 139         dca->dca_mcr = MCR_DTR | MCR_RTS;
 140 }
 141
 142 /* ARGSUSED */
 143 #ifndef SMALL
 144 int
 145 dcagetchar(dev_t dev)
 146 {
 147         struct dcadevice *dca = dcacnaddr;
 148         short stat;
 149         int c;
 150
 151         if (((stat = dca->dca_lsr) & LSR_RXRDY) == 0)
 152                 return 0;
 153         c = dca->dca_data;
 154         return c;
 155 }
 156 #else
 157 int
 158 dcagetchar(dev_t dev)
 159 {
 160
 161         return 0;
 162 }
 163 #endif
 164
 165 /* ARGSUSED */
 166 void
 167 dcaputchar(dev_t dev, int c)
 168 {
 169         struct dcadevice *dca = dcacnaddr;
 170         int timo;
 171         short stat;
 172
 173         /* wait a reasonable time for the transmitter to come ready */
 174         timo = 50000;
 175         while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
 176                 ;
 177         dca->dca_data = c;
 178         /* wait for this transmission to complete */
 179         timo = 1000000;
 180         while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
 181                 ;
 182 }
 183 #endif