Annotation of sys/arch/hp300/stand/common/dca.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: dca.c,v 1.6 2006/08/17 06:31:10 miod Exp $ */
2: /* $NetBSD: dca.c,v 1.10 1996/10/06 01:42:48 mycroft Exp $ */
3:
4: /*
5: * Copyright (c) 1988 University of Utah.
6: * Copyright (c) 1990, 1993
7: * The Regents of the University of California. All rights reserved.
8: *
9: * This code is derived from software contributed to Berkeley by
10: * the Systems Programming Group of the University of Utah Computer
11: * Science Department.
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that the following conditions
15: * are met:
16: * 1. Redistributions of source code must retain the above copyright
17: * notice, this list of conditions and the following disclaimer.
18: * 2. Redistributions in binary form must reproduce the above copyright
19: * notice, this list of conditions and the following disclaimer in the
20: * documentation and/or other materials provided with the distribution.
21: * 3. Neither the name of the University nor the names of its contributors
22: * may be used to endorse or promote products derived from this software
23: * without specific prior written permission.
24: *
25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35: * SUCH DAMAGE.
36: *
37: * @(#)dca.c 8.1 (Berkeley) 6/10/93
38: */
39:
40: #ifdef DCACONSOLE
41: #include <sys/param.h>
42:
43: #include <hp300/dev/dcareg.h>
44:
45: #include "samachdep.h"
46: #include "consdefs.h"
47:
48: struct dcadevice *dcacnaddr = 0;
49:
50: #define DCACONSCODE 9 /* XXX */
51:
52: void
53: dcaprobe(struct consdev *cp)
54: {
55: struct dcadevice *dca;
56:
57: dcacnaddr = (struct dcadevice *) sctoaddr(DCACONSCODE);
58: if (badaddr((char *)dcacnaddr))
59: return;
60:
61: dca = dcacnaddr;
62: switch (dca->dca_id) {
63: case DCAID0:
64: case DCAID1:
65: cp->cn_pri = CN_NORMAL;
66: break;
67: case DCAID0 | DCACON:
68: case DCAID1 | DCACON:
69: cp->cn_pri = CN_REMOTE;
70: break;
71: default:
72: break;
73: }
74: }
75:
76: void
77: dcainit(struct consdev *cp)
78: {
79: struct dcadevice *dca = dcacnaddr;
80:
81: dca->dca_reset = 0xFF;
82: DELAY(100);
83: dca->dca_ic = 0;
84: dca->dca_cfcr = CFCR_DLAB;
85: dca->dca_data = DCABRD(9600) & 0xFF;
86: dca->dca_ier = DCABRD(9600) >> 8;
87: dca->dca_cfcr = CFCR_8BITS;
88: dca->dca_fifo =
89: FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1;
90: dca->dca_mcr = MCR_DTR | MCR_RTS;
91: }
92:
93: /* ARGSUSED */
94: int
95: dcagetchar(dev_t dev)
96: {
97: #ifndef SMALL
98: struct dcadevice *dca = dcacnaddr;
99: short stat;
100: int c;
101:
102: if (((stat = dca->dca_lsr) & LSR_RXRDY) == 0)
103: return(0);
104: c = dca->dca_data;
105: return(c);
106: #else
107: return(0);
108: #endif
109: }
110:
111: /* ARGSUSED */
112: void
113: dcaputchar(dev_t dev, int c)
114: {
115: struct dcadevice *dca = dcacnaddr;
116: int timo;
117: short stat;
118:
119: /* wait a reasonable time for the transmitter to come ready */
120: timo = 50000;
121: while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
122: ;
123: dca->dca_data = c;
124: /* wait for this transmission to complete */
125: timo = 1000000;
126: while (((stat = dca->dca_lsr) & LSR_TXRDY) == 0 && --timo)
127: ;
128: }
129: #endif
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