moxa_isa.c revision 1.23 1 1.23 thorpej /* $NetBSD: moxa_isa.c,v 1.23 2021/08/07 16:19:12 thorpej Exp $ */
2 1.1 jdolecek
3 1.1 jdolecek /*
4 1.1 jdolecek * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
5 1.1 jdolecek * Copyright (c) 1995 Charles M. Hannum. All rights reserved.
6 1.1 jdolecek *
7 1.1 jdolecek * This code is derived from public-domain software written by
8 1.1 jdolecek * Roland McGrath.
9 1.1 jdolecek *
10 1.1 jdolecek * Redistribution and use in source and binary forms, with or without
11 1.1 jdolecek * modification, are permitted provided that the following conditions
12 1.1 jdolecek * are met:
13 1.1 jdolecek * 1. Redistributions of source code must retain the above copyright
14 1.1 jdolecek * notice, this list of conditions and the following disclaimer.
15 1.1 jdolecek * 2. Redistributions in binary form must reproduce the above copyright
16 1.1 jdolecek * notice, this list of conditions and the following disclaimer in the
17 1.1 jdolecek * documentation and/or other materials provided with the distribution.
18 1.1 jdolecek * 3. All advertising materials mentioning features or use of this software
19 1.1 jdolecek * must display the following acknowledgement:
20 1.1 jdolecek * This product includes software developed by Charles M. Hannum.
21 1.1 jdolecek * 4. The name of the author may not be used to endorse or promote products
22 1.1 jdolecek * derived from this software without specific prior written permission.
23 1.1 jdolecek *
24 1.1 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 1.1 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 1.1 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 1.1 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 1.1 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 1.1 jdolecek * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 1.1 jdolecek * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 1.1 jdolecek * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 1.1 jdolecek * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 1.1 jdolecek * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 1.1 jdolecek */
35 1.2 lukem
36 1.2 lukem #include <sys/cdefs.h>
37 1.23 thorpej __KERNEL_RCSID(0, "$NetBSD: moxa_isa.c,v 1.23 2021/08/07 16:19:12 thorpej Exp $");
38 1.1 jdolecek
39 1.1 jdolecek #include <sys/param.h>
40 1.1 jdolecek #include <sys/systm.h>
41 1.1 jdolecek #include <sys/device.h>
42 1.1 jdolecek #include <sys/termios.h>
43 1.1 jdolecek
44 1.15 ad #include <sys/bus.h>
45 1.15 ad #include <sys/intr.h>
46 1.1 jdolecek
47 1.1 jdolecek #include <dev/ic/comreg.h>
48 1.1 jdolecek #include <dev/ic/comvar.h>
49 1.1 jdolecek
50 1.1 jdolecek #include <dev/isa/isavar.h>
51 1.1 jdolecek #include <dev/isa/com_multi.h>
52 1.1 jdolecek
53 1.1 jdolecek #define NSLAVES 8
54 1.1 jdolecek
55 1.1 jdolecek struct moxa_isa_softc {
56 1.1 jdolecek void *sc_ih;
57 1.1 jdolecek
58 1.1 jdolecek bus_space_tag_t sc_iot;
59 1.1 jdolecek int sc_iobase;
60 1.1 jdolecek
61 1.1 jdolecek int sc_alive; /* mask of slave units attached */
62 1.1 jdolecek void *sc_slaves[NSLAVES]; /* com device unit numbers */
63 1.1 jdolecek bus_space_handle_t sc_slaveioh[NSLAVES];
64 1.1 jdolecek };
65 1.1 jdolecek
66 1.19 cegger int moxa_isaprobe(device_t, cfdata_t, void *);
67 1.19 cegger void moxa_isaattach(device_t, device_t, void *);
68 1.11 perry int moxa_isaintr(void *);
69 1.1 jdolecek
70 1.20 chs CFATTACH_DECL_NEW(moxa_isa, sizeof(struct moxa_isa_softc),
71 1.6 thorpej moxa_isaprobe, moxa_isaattach, NULL, NULL);
72 1.1 jdolecek
73 1.1 jdolecek int
74 1.19 cegger moxa_isaprobe(device_t parent, cfdata_t self, void *aux)
75 1.1 jdolecek {
76 1.1 jdolecek struct isa_attach_args *ia = aux;
77 1.1 jdolecek bus_space_tag_t iot = ia->ia_iot;
78 1.1 jdolecek bus_space_handle_t ioh;
79 1.3 thorpej int i, iobase, rv = 1;
80 1.1 jdolecek
81 1.1 jdolecek /*
82 1.1 jdolecek * Do the normal com probe for the first UART and assume
83 1.1 jdolecek * its presence, and the ability to map the other UARTS,
84 1.1 jdolecek * means there is a multiport board there.
85 1.1 jdolecek * XXX Needs more robustness.
86 1.1 jdolecek */
87 1.1 jdolecek
88 1.3 thorpej if (ia->ia_nio < 1)
89 1.3 thorpej return (0);
90 1.3 thorpej if (ia->ia_nirq < 1)
91 1.3 thorpej return (0);
92 1.3 thorpej
93 1.3 thorpej if (ISA_DIRECT_CONFIG(ia))
94 1.3 thorpej return (0);
95 1.3 thorpej
96 1.1 jdolecek /* Disallow wildcarded i/o address. */
97 1.10 drochner if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
98 1.3 thorpej return (0);
99 1.10 drochner if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
100 1.1 jdolecek return (0);
101 1.1 jdolecek
102 1.1 jdolecek /* if the first port is in use as console, then it. */
103 1.3 thorpej if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
104 1.1 jdolecek goto checkmappings;
105 1.1 jdolecek
106 1.3 thorpej if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
107 1.1 jdolecek rv = 0;
108 1.1 jdolecek goto out;
109 1.1 jdolecek }
110 1.1 jdolecek rv = comprobe1(iot, ioh);
111 1.1 jdolecek bus_space_unmap(iot, ioh, COM_NPORTS);
112 1.1 jdolecek if (rv == 0)
113 1.1 jdolecek goto out;
114 1.1 jdolecek
115 1.1 jdolecek checkmappings:
116 1.3 thorpej for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
117 1.1 jdolecek iobase += COM_NPORTS;
118 1.1 jdolecek
119 1.1 jdolecek if (com_is_console(iot, iobase, 0))
120 1.1 jdolecek continue;
121 1.1 jdolecek
122 1.1 jdolecek if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
123 1.1 jdolecek rv = 0;
124 1.1 jdolecek goto out;
125 1.1 jdolecek }
126 1.1 jdolecek bus_space_unmap(iot, ioh, COM_NPORTS);
127 1.1 jdolecek }
128 1.1 jdolecek
129 1.1 jdolecek out:
130 1.3 thorpej if (rv) {
131 1.3 thorpej ia->ia_nio = 1;
132 1.3 thorpej ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
133 1.3 thorpej
134 1.3 thorpej ia->ia_nirq = 1;
135 1.3 thorpej
136 1.3 thorpej ia->ia_niomem = 0;
137 1.3 thorpej ia->ia_ndrq = 0;
138 1.3 thorpej }
139 1.1 jdolecek return (rv);
140 1.1 jdolecek }
141 1.1 jdolecek
142 1.1 jdolecek void
143 1.19 cegger moxa_isaattach(device_t parent, device_t self, void *aux)
144 1.1 jdolecek {
145 1.20 chs struct moxa_isa_softc *sc = device_private(self);
146 1.1 jdolecek struct isa_attach_args *ia = aux;
147 1.1 jdolecek struct commulti_attach_args ca;
148 1.1 jdolecek bus_space_tag_t iot = ia->ia_iot;
149 1.1 jdolecek int i, iobase;
150 1.1 jdolecek
151 1.1 jdolecek printf("\n");
152 1.1 jdolecek
153 1.1 jdolecek sc->sc_iot = ia->ia_iot;
154 1.3 thorpej sc->sc_iobase = ia->ia_io[0].ir_addr;
155 1.1 jdolecek
156 1.1 jdolecek for (i = 0; i < NSLAVES; i++) {
157 1.1 jdolecek iobase = sc->sc_iobase + i * COM_NPORTS;
158 1.1 jdolecek if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
159 1.1 jdolecek bus_space_map(iot, iobase, COM_NPORTS, 0,
160 1.1 jdolecek &sc->sc_slaveioh[i])) {
161 1.21 msaitoh aprint_error_dev(self,
162 1.21 msaitoh "can't map i/o space for slave %d\n", i);
163 1.1 jdolecek return;
164 1.1 jdolecek }
165 1.1 jdolecek }
166 1.1 jdolecek
167 1.1 jdolecek for (i = 0; i < NSLAVES; i++) {
168 1.1 jdolecek ca.ca_slave = i;
169 1.1 jdolecek ca.ca_iot = sc->sc_iot;
170 1.1 jdolecek ca.ca_ioh = sc->sc_slaveioh[i];
171 1.1 jdolecek ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
172 1.1 jdolecek ca.ca_noien = 1;
173 1.1 jdolecek
174 1.22 thorpej sc->sc_slaves[i] = config_found(self, &ca, commultiprint,
175 1.23 thorpej CFARGS_NONE);
176 1.1 jdolecek if (sc->sc_slaves[i] != NULL)
177 1.1 jdolecek sc->sc_alive |= 1 << i;
178 1.1 jdolecek }
179 1.1 jdolecek
180 1.3 thorpej sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
181 1.3 thorpej IST_EDGE, IPL_SERIAL, moxa_isaintr, sc);
182 1.1 jdolecek }
183 1.1 jdolecek
184 1.1 jdolecek int
185 1.17 dsl moxa_isaintr(void *arg)
186 1.1 jdolecek {
187 1.1 jdolecek struct moxa_isa_softc *sc = arg;
188 1.1 jdolecek int bits;
189 1.8 chs int rv = 0;
190 1.1 jdolecek
191 1.1 jdolecek bits = sc->sc_alive;
192 1.1 jdolecek if (bits == 0)
193 1.1 jdolecek return (0);
194 1.1 jdolecek
195 1.1 jdolecek for (;;rv = 0) {
196 1.1 jdolecek #define TRY(n) \
197 1.1 jdolecek if (bits & (1 << (n))) \
198 1.1 jdolecek rv += comintr(sc->sc_slaves[n]);
199 1.1 jdolecek TRY(0);
200 1.1 jdolecek TRY(1);
201 1.1 jdolecek TRY(2);
202 1.1 jdolecek TRY(3);
203 1.1 jdolecek TRY(4);
204 1.1 jdolecek TRY(5);
205 1.1 jdolecek TRY(6);
206 1.1 jdolecek TRY(7);
207 1.1 jdolecek #undef TRY
208 1.1 jdolecek if (rv == 0)
209 1.1 jdolecek return (1);
210 1.1 jdolecek }
211 1.1 jdolecek }
212