1 /* $OpenBSD: boca.c,v 1.16 2002/03/14 01:26:56 millert 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
51 struct 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
63 int bocaprobe(struct device *, void *, void *);
64 void bocaattach(struct device *, struct device *, void *);
65 int bocaintr(void *);
66 int bocaprint(void *, const char *);
67
68 struct cfattach boca_ca = {
69 sizeof(struct boca_softc), bocaprobe, bocaattach,
70 };
71
72 struct cfdriver boca_cd = {
73 NULL, "boca", DV_TTY
74 };
75
76 int
77 bocaprobe(parent, self, aux)
78 struct device *parent;
79 void *self;
80 void *aux;
81 {
82 struct isa_attach_args *ia = aux;
83 int iobase = ia->ia_iobase;
84 bus_space_tag_t iot = ia->ia_iot;
85 bus_space_handle_t ioh;
86 int i, rv = 1;
87
88 /*
89 * Do the normal com probe for the first UART and assume
90 * its presence, and the ability to map the other UARTS,
91 * means there is a multiport board there.
92 * XXX Needs more robustness.
93 */
94
95 /* if the first port is in use as console, then it. */
96 if (iobase == comconsaddr && !comconsattached)
97 goto checkmappings;
98
99 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
100 rv = 0;
101 goto out;
102 }
103 rv = comprobe1(iot, ioh);
104 bus_space_unmap(iot, ioh, COM_NPORTS);
105 if (rv == 0)
106 goto out;
107
108 checkmappings:
109 for (i = 1; i < NSLAVES; i++) {
110 iobase += COM_NPORTS;
111
112 if (iobase == comconsaddr && !comconsattached)
113 continue;
114
115 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
116 rv = 0;
117 goto out;
118 }
119 bus_space_unmap(iot, ioh, COM_NPORTS);
120 }
121
122 out:
123 if (rv)
124 ia->ia_iosize = NSLAVES * COM_NPORTS;
125 return (rv);
126 }
127
128 int
129 bocaprint(aux, pnp)
130 void *aux;
131 const char *pnp;
132 {
133 struct commulti_attach_args *ca = aux;
134
135 if (pnp)
136 printf("com at %s", pnp);
137 printf(" slave %d", ca->ca_slave);
138 return (UNCONF);
139 }
140
141 void
142 bocaattach(parent, self, aux)
143 struct device *parent, *self;
144 void *aux;
145 {
146 struct boca_softc *sc = (void *)self;
147 struct isa_attach_args *ia = aux;
148 struct commulti_attach_args ca;
149 bus_space_tag_t iot = ia->ia_iot;
150 int i;
151
152 sc->sc_iot = ia->ia_iot;
153 sc->sc_iobase = ia->ia_iobase;
154
155 for (i = 0; i < NSLAVES; i++)
156 if (bus_space_map(iot, sc->sc_iobase + i * COM_NPORTS,
157 COM_NPORTS, 0, &sc->sc_slaveioh[i]))
158 panic("bocaattach: couldn't map slave %d", i);
159
160 printf("\n");
161
162 for (i = 0; i < NSLAVES; i++) {
163
164 ca.ca_slave = i;
165 ca.ca_iot = sc->sc_iot;
166 ca.ca_ioh = sc->sc_slaveioh[i];
167 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
168 ca.ca_noien = 0;
169
170 sc->sc_slaves[i] = config_found(self, &ca, bocaprint);
171 if (sc->sc_slaves[i] != NULL)
172 sc->sc_alive |= 1 << i;
173 }
174
175 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
176 IPL_TTY, bocaintr, sc, sc->sc_dev.dv_xname);
177 }
178
179 int
180 bocaintr(arg)
181 void *arg;
182 {
183 struct boca_softc *sc = arg;
184 bus_space_tag_t iot = sc->sc_iot;
185 int alive = sc->sc_alive;
186 int bits;
187
188 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 7) & alive;
189 if (bits == 0)
190 return (0);
191
192 for (;;) {
193 #define TRY(n) \
194 if (bits & (1 << (n))) \
195 comintr(sc->sc_slaves[n]);
196 TRY(0);
197 TRY(1);
198 TRY(2);
199 TRY(3);
200 TRY(4);
201 TRY(5);
202 TRY(6);
203 TRY(7);
204 #undef TRY
205 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], 7) & alive;
206 if (bits == 0)
207 return (1);
208 }
209 }