1 /*        $NetBSD: dca.c,v 1.8 2023/04/21 22:44:27 tsutsui Exp $      */
2 
3 /*
4  * Copyright (c) 1988 University of Utah.
5  * Copyright (c) 1990, 1993
6  *        The Regents of the University of California.  All rights reserved.
7  *
8  * This code is derived from software contributed to Berkeley by
9  * the Systems Programming Group of the University of Utah Computer
10  * Science Department.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  *
36  *        @(#)dca.c 8.1 (Berkeley) 6/10/93
37  */
38 
39 #ifdef DCACONSOLE
40 #include <sys/param.h>
41 #include <dev/cons.h>
42 
43 #include <hp300/stand/common/dcareg.h>
44 #include <hp300/stand/common/consdefs.h>
45 #include <hp300/stand/common/samachdep.h>
46 
47 /* If not using 4.4 devs */
48 #ifndef dca_reset
49 #define dca_id dca_irid
50 #define dca_reset dca_id
51 #endif
52 
53 struct dcadevice *dcacnaddr = 0;
54 
55 #define DCACONSCODE 9         /* XXX */
56 
57 void
dcaprobe(struct consdev * cp)58 dcaprobe(struct consdev *cp)
59 {
60           struct dcadevice *dca;
61 
62           dcacnaddr = (struct dcadevice *) sctoaddr(DCACONSCODE);
63           if (badaddr((char *)dcacnaddr)) {
64                     cp->cn_pri = CN_DEAD;
65                     return;
66           }
67 #ifdef FORCEDCACONSOLE
68           cp->cn_pri = CN_REMOTE;
69 #else
70           dca = dcacnaddr;
71           switch (dca->dca_id) {
72           case DCAID0:
73           case DCAID1:
74                     cp->cn_pri = CN_NORMAL;
75                     break;
76           case DCAREMID0:
77           case DCAREMID1:
78                     cp->cn_pri = CN_REMOTE;
79                     break;
80           default:
81                     cp->cn_pri = CN_DEAD;
82                     break;
83           }
84 
85 #endif
86           curcons_scode = DCACONSCODE;
87 }
88 
89 void
dcainit(struct consdev * cp)90 dcainit(struct consdev *cp)
91 {
92           struct dcadevice *dca = dcacnaddr;
93 
94           dca->dca_reset = 0xFF;
95           DELAY(100);
96           dca->dca_ic = 0;
97           dca->dca_cfcr = CFCR_DLAB;
98           dca->dca_data = DCABRD(9600) & 0xFF;
99           dca->dca_ier = DCABRD(9600) >> 8;
100           dca->dca_cfcr = CFCR_8BITS;
101           dca->dca_fifo =
102               FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1;
103           dca->dca_mcr = MCR_DTR | MCR_RTS;
104 }
105 
106 #ifndef SMALL
107 int
dcagetchar(dev_t dev)108 dcagetchar(dev_t dev)
109 {
110           struct dcadevice *dca = dcacnaddr;
111           short stat;
112           int c;
113 
114           if (((stat = dca->dca_lsr) & LSR_RXRDY) == 0)
115                     return 0;
116           c = dca->dca_data;
117           return c;
118 }
119 #else
120 int
dcagetchar(dev_t dev)121 dcagetchar(dev_t dev)
122 {
123 
124           return 0;
125 }
126 #endif
127 
128 void
dcaputchar(dev_t dev,int c)129 dcaputchar(dev_t dev, int c)
130 {
131           struct dcadevice *dca = dcacnaddr;
132           int timo;
133           short stat;
134 
135           /* wait a reasonable time for the transmitter to come ready */
136           timo = 50000;
137           while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
138                     ;
139           dca->dca_data = c;
140           /* wait for this transmission to complete */
141           timo = 1000000;
142           while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
143                     ;
144 }
145 #endif
146