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1/* $OpenBSD: boca.c,v 1.18 2024/05/28 05:46:32 jsg Exp $ */
2/* $NetBSD: boca.c,v 1.15 1996/05/12 23:51:50 mycroft Exp $ */
3
4/*
5 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
6 * Copyright (c) 1995 Charles Hannum. All rights reserved.
7 *
8 * This code is derived from public-domain software written by
9 * Roland McGrath, and information provided by David Muir Sharnoff.
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. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Charles Hannum.
22 * 4. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/device.h>
40#include <sys/termios.h>
41
42#include <machine/bus.h>
43#include <machine/intr.h>
44
45#include <dev/isa/isavar.h>
46#include <dev/ic/comreg.h>
47#include <dev/ic/comvar.h>
48
49#define NSLAVES 8
50
51struct boca_softc {
52 struct device sc_dev;
53 void *sc_ih;
54
55 bus_space_tag_t sc_iot;
56 int sc_iobase;
57
58 int sc_alive; /* mask of slave units attached */
59 void *sc_slaves[NSLAVES]; /* com device unit numbers */
60 bus_space_handle_t sc_slaveioh[NSLAVES];
61};
62
63int bocaprobe(struct device *, void *, void *);
64void bocaattach(struct device *, struct device *, void *);
65int bocaintr(void *);
66int bocaprint(void *, const char *);
67
68const struct cfattach boca_ca = {
69 sizeof(struct boca_softc), bocaprobe, bocaattach,
70};
71
72struct cfdriver boca_cd = {
73 NULL, "boca", DV_TTY
74};
75
76int
77bocaprobe(struct device *parent, void *self, void *aux)
78{
79 struct isa_attach_args *ia = aux;
80 int iobase = ia->ia_iobase;
81 bus_space_tag_t iot = ia->ia_iot;
82 bus_space_handle_t ioh;
83 int i, rv = 1;
84
85 /*
86 * Do the normal com probe for the first UART and assume
87 * its presence, and the ability to map the other UARTS,
88 * means there is a multiport board there.
89 * XXX Needs more robustness.
90 */
91
92 /* if the first port is in use as console, then it. */
93 if (iobase == comconsaddr && !comconsattached)
94 goto checkmappings;
95
96 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
97 rv = 0;
98 goto out;
99 }
100 rv = comprobe1(iot, ioh);
101 bus_space_unmap(iot, ioh, COM_NPORTS);
102 if (rv == 0)
103 goto out;
104
105checkmappings:
106 for (i = 1; i < NSLAVES; i++) {
107 iobase += COM_NPORTS;
108
109 if (iobase == comconsaddr && !comconsattached)
110 continue;
111
112 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
113 rv = 0;
114 goto out;
115 }
116 bus_space_unmap(iot, ioh, COM_NPORTS);
117 }
118
119out:
120 if (rv)
121 ia->ia_iosize = NSLAVES * COM_NPORTS;
122 return (rv);
123}
124
125int
126bocaprint(void *aux, const char *pnp)
127{
128 struct commulti_attach_args *ca = aux;
129
130 if (pnp)
131 printf("com at %s", pnp);
132 printf(" slave %d", ca->ca_slave);
133 return (UNCONF);
134}
135
136void
137bocaattach(struct device *parent, struct device *self, void *aux)
138{
139 struct boca_softc *sc = (void *)self;
140 struct isa_attach_args *ia = aux;
141 struct commulti_attach_args ca;
142 bus_space_tag_t iot = ia->ia_iot;
143 int i;
144
145 sc->sc_iot = ia->ia_iot;
146 sc->sc_iobase = ia->ia_iobase;
147
148 for (i = 0; i < NSLAVES; i++)
149 if (bus_space_map(iot, sc->sc_iobase + i * COM_NPORTS,
150 COM_NPORTS, 0, &sc->sc_slaveioh[i]))
151 panic("bocaattach: couldn't map slave %d", i);
152
153 printf("\n");
154
155 for (i = 0; i < NSLAVES; i++) {
156
157 ca.ca_slave = i;
158 ca.ca_iot = sc->sc_iot;
159 ca.ca_ioh = sc->sc_slaveioh[i];
160 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
161 ca.ca_noien = 0;
162
163 sc->sc_slaves[i] = config_found(self, &ca, bocaprint);
164 if (sc->sc_slaves[i] != NULL)
165 sc->sc_alive |= 1 << i;
166 }
167
168 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
169 IPL_TTY, bocaintr, sc, sc->sc_dev.dv_xname);
170}
171
172int
173bocaintr(void *arg)
174{
175 struct boca_softc *sc = arg;
176 bus_space_tag_t iot = sc->sc_iot;
177 int alive = sc->sc_alive;
178 int bits;
179
180 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 7) & alive;
181 if (bits == 0)
182 return (0);
183
184 for (;;) {
185#define TRY(n) \
186 if (bits & (1 << (n))) \
187 comintr(sc->sc_slaves[n]);
188 TRY(0);
189 TRY(1);
190 TRY(2);
191 TRY(3);
192 TRY(4);
193 TRY(5);
194 TRY(6);
195 TRY(7);
196#undef TRY
197 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 7) & alive;
198 if (bits == 0)
199 return (1);
200 }
201}