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1.1 root 1: /*
2: * Copyright (c) 1988 University of Utah.
3: * Copyright (c) 1990 The Regents of the University of California.
4: * All rights reserved.
5: *
6: * This code is derived from software contributed to Berkeley by
7: * the Systems Programming Group of the University of Utah Computer
8: * Science Department.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the University of
21: * California, Berkeley and its contributors.
22: * 4. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: *
38: * @(#)dcm.c 7.3 (Berkeley) 5/7/91
39: */
40:
41: #ifdef DCMCONSOLE
42: #include "sys/param.h"
43: #include "../hp300/cons.h"
44: #include "../dev/device.h"
45: #include "../dev/dcmreg.h"
46:
47: struct dcmdevice *dcmcnaddr = NULL;
48:
49: dcmprobe(cp)
50: struct consdev *cp;
51: {
52: extern struct hp_hw sc_table[];
53: register struct hp_hw *hw;
54: register struct dcmdevice *dcm;
55:
56: for (hw = sc_table; hw < &sc_table[MAXCTLRS]; hw++)
57: if (HW_ISDEV(hw, D_COMMDCM) && !badaddr((caddr_t)hw->hw_kva))
58: break;
59: if (!HW_ISDEV(hw, D_COMMDCM)) {
60: cp->cn_pri = CN_DEAD;
61: return;
62: }
63: dcmcnaddr = (struct dcmdevice *) hw->hw_kva;
64:
65: dcm = dcmcnaddr;
66: switch (dcm->dcm_rsid) {
67: case DCMID:
68: cp->cn_pri = CN_NORMAL;
69: break;
70: case DCMID|DCMCON:
71: cp->cn_pri = CN_REMOTE;
72: break;
73: default:
74: cp->cn_pri = CN_DEAD;
75: break;
76: }
77: }
78:
79: dcminit(cp)
80: struct consdev *cp;
81: {
82: register struct dcmdevice *dcm = dcmcnaddr;
83: register int port = CONUNIT;
84:
85: dcm->dcm_ic = IC_ID;
86: while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr)
87: ;
88: dcm->dcm_data[port].dcm_baud = BR_9600;
89: dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP;
90: SEM_LOCK(dcm);
91: dcm->dcm_cmdtab[port].dcm_data |= CT_CON;
92: dcm->dcm_cr |= (1 << port);
93: SEM_UNLOCK(dcm);
94: DELAY(15000);
95: }
96:
97: #ifndef SMALL
98: dcmgetchar()
99: {
100: register struct dcmdevice *dcm = dcmcnaddr;
101: register struct dcmrfifo *fifo;
102: register struct dcmpreg *pp;
103: register unsigned head;
104: int c, stat, port;
105:
106: port = CONUNIT;
107: pp = dcm_preg(dcm, port);
108: head = pp->r_head & RX_MASK;
109: if (head == (pp->r_tail & RX_MASK))
110: return(0);
111: fifo = &dcm->dcm_rfifos[3-port][head>>1];
112: c = fifo->data_char;
113: stat = fifo->data_stat;
114: pp->r_head = (head + 2) & RX_MASK;
115: SEM_LOCK(dcm);
116: stat = dcm->dcm_iir;
117: SEM_UNLOCK(dcm);
118: return(c);
119: }
120: #else
121: dcmgetchar()
122: {
123: return(0);
124: }
125: #endif
126:
127: dcmputchar(c)
128: register int c;
129: {
130: register struct dcmdevice *dcm = dcmcnaddr;
131: register struct dcmpreg *pp;
132: register int timo;
133: unsigned tail;
134: int port, stat;
135:
136: port = CONUNIT;
137: pp = dcm_preg(dcm, port);
138: tail = pp->t_tail & TX_MASK;
139: timo = 50000;
140: while (tail != (pp->t_head & TX_MASK) && --timo)
141: ;
142: dcm->dcm_tfifos[3-port][tail].data_char = c;
143: pp->t_tail = tail = (tail + 1) & TX_MASK;
144: SEM_LOCK(dcm);
145: dcm->dcm_cmdtab[port].dcm_data |= CT_TX;
146: dcm->dcm_cr |= (1 << port);
147: SEM_UNLOCK(dcm);
148: timo = 1000000;
149: while (tail != (pp->t_head & TX_MASK) && --timo)
150: ;
151: SEM_LOCK(dcm);
152: stat = dcm->dcm_iir;
153: SEM_UNLOCK(dcm);
154: }
155: #endif
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