1/*	$NetBSD: dcm.c,v 1.10 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 *	@(#)dcm.c	8.1 (Berkeley) 6/10/93
37 */
38
39#ifdef DCMCONSOLE
40#include <sys/param.h>
41#include <dev/cons.h>
42
43#include <hp300/dev/dcmreg.h>
44
45#include <hp300/stand/common/consdefs.h>
46#include <hp300/stand/common/samachdep.h>
47#include <hp300/stand/common/device.h>
48
49struct dcmdevice *dcmcnaddr = NULL;
50
51#define	DCMCONUNIT	1	/* XXX */
52
53void
54dcmprobe(struct consdev *cp)
55{
56	struct hp_hw *hw;
57	struct dcmdevice *dcm;
58
59	for (hw = sc_table; hw < &sc_table[MAXCTLRS]; hw++)
60		if (HW_ISDEV(hw, D_COMMDCM) && !badaddr((void *)hw->hw_kva))
61			break;
62	if (!HW_ISDEV(hw, D_COMMDCM)) {
63		cp->cn_pri = CN_DEAD;
64		return;
65	}
66	dcmcnaddr = (struct dcmdevice *) hw->hw_kva;
67
68#ifdef FORCEDCMCONSOLE
69	cp->cn_pri = CN_REMOTE;
70#else
71	dcm = dcmcnaddr;
72	switch (dcm->dcm_rsid) {
73	case DCMID:
74		cp->cn_pri = CN_NORMAL;
75		break;
76	case DCMID|DCMCON:
77		cp->cn_pri = CN_REMOTE;
78		break;
79	default:
80		cp->cn_pri = CN_DEAD;
81		break;
82	}
83
84	curcons_scode = hw->hw_sc;
85#endif
86}
87
88void
89dcminit(struct consdev *cp)
90{
91	struct dcmdevice *dcm = dcmcnaddr;
92	int port = DCMCONUNIT;
93
94	dcm->dcm_ic = IC_ID;
95	while (dcm->dcm_thead[port].ptr != dcm->dcm_ttail[port].ptr)
96		;
97	dcm->dcm_data[port].dcm_baud = BR_9600;
98	dcm->dcm_data[port].dcm_conf = LC_8BITS | LC_1STOP;
99	SEM_LOCK(dcm);
100	dcm->dcm_cmdtab[port].dcm_data |= CT_CON;
101	dcm->dcm_cr |= (1 << port);
102	SEM_UNLOCK(dcm);
103	DELAY(15000);
104}
105
106#ifndef SMALL
107int
108dcmgetchar(dev_t dev)
109{
110	struct dcmdevice *dcm = dcmcnaddr;
111	struct dcmrfifo *fifo;
112	struct dcmpreg *pp;
113	unsigned int head;
114	int c, port;
115
116	port = DCMCONUNIT;
117	pp = dcm_preg(dcm, port);
118	head = pp->r_head & RX_MASK;
119	if (head == (pp->r_tail & RX_MASK))
120		return 0;
121	fifo = &dcm->dcm_rfifos[3-port][head>>1];
122	c = fifo->data_char;
123	(void)fifo->data_stat;
124	pp->r_head = (head + 2) & RX_MASK;
125	SEM_LOCK(dcm);
126	(void)dcm->dcm_iir;
127	SEM_UNLOCK(dcm);
128	return c;
129}
130#else
131int
132dcmgetchar(dev_t dev)
133{
134
135	return 0;
136}
137#endif
138
139void
140dcmputchar(dev_t dev, int c)
141{
142	struct dcmdevice *dcm = dcmcnaddr;
143	struct dcmpreg *pp;
144	int timo;
145	unsigned int tail;
146	int port;
147
148	port = DCMCONUNIT;
149	pp = dcm_preg(dcm, port);
150	tail = pp->t_tail & TX_MASK;
151	timo = 50000;
152	while (tail != (pp->t_head & TX_MASK) && --timo)
153		;
154	dcm->dcm_tfifos[3-port][tail].data_char = c;
155	pp->t_tail = tail = (tail + 1) & TX_MASK;
156	SEM_LOCK(dcm);
157	dcm->dcm_cmdtab[port].dcm_data |= CT_TX;
158	dcm->dcm_cr |= (1 << port);
159	SEM_UNLOCK(dcm);
160	timo = 1000000;
161	while (tail != (pp->t_head & TX_MASK) && --timo)
162		;
163	SEM_LOCK(dcm);
164	(void)dcm->dcm_iir;
165	SEM_UNLOCK(dcm);
166}
167#endif
168