1 /* $NetBSD: boca.c,v 1.57 2021/08/07 16:19:12 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
5 * Copyright (c) 1995 Charles M. Hannum. All rights reserved.
6 *
7 * This code is derived from public-domain software written by
8 * Roland McGrath, and information provided by David Muir Sharnoff.
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 Charles M. Hannum.
21 * 4. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: boca.c,v 1.57 2021/08/07 16:19:12 thorpej Exp $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/device.h>
42 #include <sys/termios.h>
43 #include <sys/kernel.h>
44 #include <sys/callout.h>
45
46 #include <sys/bus.h>
47 #include <sys/intr.h>
48
49 #include <dev/ic/comreg.h>
50 #include <dev/ic/comvar.h>
51
52 #include <dev/isa/isavar.h>
53 #include <dev/isa/com_multi.h>
54
55 #define NSLAVES 8
56
57 struct boca_softc {
58 device_t sc_dev;
59 void *sc_ih;
60
61 bus_space_tag_t sc_iot;
62 int sc_iobase;
63
64 int sc_alive; /* mask of slave units attached */
65 void *sc_slaves[NSLAVES]; /* com device unit numbers */
66 bus_space_handle_t sc_slaveioh[NSLAVES];
67 callout_t fixup;
68 };
69
70 int bocaprobe(device_t, cfdata_t, void *);
71 void bocaattach(device_t, device_t, void *);
72 int bocaintr(void *);
73 void boca_fixup(void *);
74
75 CFATTACH_DECL_NEW(boca, sizeof(struct boca_softc),
76 bocaprobe, bocaattach, NULL, NULL);
77
78 int
bocaprobe(device_t parent,cfdata_t self,void * aux)79 bocaprobe(device_t parent, cfdata_t self, void *aux)
80 {
81 struct isa_attach_args *ia = aux;
82 bus_space_tag_t iot = ia->ia_iot;
83 bus_space_handle_t ioh;
84 int i, iobase, rv = 1;
85
86 /*
87 * Do the normal com probe for the first UART and assume
88 * its presence, and the ability to map the other UARTS,
89 * means there is a multiport board there.
90 * XXX Needs more robustness.
91 */
92
93 if (ia->ia_nio < 1)
94 return (0);
95 if (ia->ia_nirq < 1)
96 return (0);
97
98 if (ISA_DIRECT_CONFIG(ia))
99 return (0);
100
101 /* Disallow wildcarded i/o address. */
102 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
103 return (0);
104 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
105 return (0);
106
107 iobase = ia->ia_io[0].ir_addr;
108
109 /* if the first port is in use as console, then it. */
110 if (com_is_console(iot, iobase, 0))
111 goto checkmappings;
112
113 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
114 rv = 0;
115 goto out;
116 }
117 rv = comprobe1(iot, ioh);
118 bus_space_unmap(iot, ioh, COM_NPORTS);
119 if (rv == 0)
120 goto out;
121
122 checkmappings:
123 for (i = 1; i < NSLAVES; i++) {
124 iobase += COM_NPORTS;
125
126 if (com_is_console(iot, iobase, 0))
127 continue;
128
129 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
130 rv = 0;
131 goto out;
132 }
133 bus_space_unmap(iot, ioh, COM_NPORTS);
134 }
135
136 out:
137 if (rv) {
138 ia->ia_nio = 1;
139 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
140
141 ia->ia_nirq = 1;
142
143 ia->ia_niomem = 0;
144 ia->ia_ndrq = 0;
145 }
146 return (rv);
147 }
148
149 void
bocaattach(device_t parent,device_t self,void * aux)150 bocaattach(device_t parent, device_t self, void *aux)
151 {
152 struct boca_softc *sc = device_private(self);
153 struct isa_attach_args *ia = aux;
154 struct commulti_attach_args ca;
155 bus_space_tag_t iot = ia->ia_iot;
156 int i, iobase;
157
158 printf("\n");
159
160 sc->sc_dev = self;
161 sc->sc_iot = ia->ia_iot;
162 sc->sc_iobase = ia->ia_io[0].ir_addr;
163
164 for (i = 0; i < NSLAVES; i++) {
165 iobase = sc->sc_iobase + i * COM_NPORTS;
166 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
167 bus_space_map(iot, iobase, COM_NPORTS, 0,
168 &sc->sc_slaveioh[i])) {
169 aprint_error_dev(sc->sc_dev,
170 "can't map i/o space for slave %d\n", i);
171 return;
172 }
173 }
174
175 for (i = 0; i < NSLAVES; i++) {
176
177 ca.ca_slave = i;
178 ca.ca_iot = sc->sc_iot;
179 ca.ca_ioh = sc->sc_slaveioh[i];
180 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
181 ca.ca_noien = 0;
182
183 sc->sc_slaves[i] = config_found(self, &ca, commultiprint,
184 CFARGS_NONE);
185 if (sc->sc_slaves[i] != NULL)
186 sc->sc_alive |= 1 << i;
187 }
188
189 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
190 IST_EDGE, IPL_SERIAL, bocaintr, sc);
191 callout_init(&sc->fixup, 0);
192 callout_reset(&sc->fixup, hz/10, boca_fixup, sc);
193 }
194
195 int
bocaintr(void * arg)196 bocaintr(void *arg)
197 {
198 struct boca_softc *sc = arg;
199 bus_space_tag_t iot = sc->sc_iot;
200 int alive = sc->sc_alive;
201 int bits;
202
203 bits = bus_space_read_1(iot, sc->sc_slaveioh[0], com_scratch) & alive;
204 if (bits == 0)
205 return (0);
206
207 for (;;) {
208 #define TRY(n) \
209 if (bits & (1 << (n))) { \
210 if (comintr(sc->sc_slaves[n]) == 0) { \
211 printf("%s: bogus intr for port %d\n", \
212 device_xname(sc->sc_dev), n); \
213 } \
214 }
215 TRY(0);
216 TRY(1);
217 TRY(2);
218 TRY(3);
219 TRY(4);
220 TRY(5);
221 TRY(6);
222 TRY(7);
223 #undef TRY
224 bits = bus_space_read_1(iot, sc->sc_slaveioh[0],
225 com_scratch) & alive;
226 if (bits == 0) {
227 return (1);
228 }
229 }
230 }
231
232 void
boca_fixup(void * v)233 boca_fixup(void *v)
234 {
235 struct boca_softc *sc = v;
236 int alive = sc->sc_alive;
237 int i, s;
238
239 s = splserial();
240
241 for (i = 0; i < 8; i++) {
242 if (alive & (1 << (i)))
243 comintr(sc->sc_slaves[i]);
244 }
245 callout_reset(&sc->fixup, hz/10, boca_fixup, sc);
246 splx(s);
247 }
248