1 /* $NetBSD: rtfps.c,v 1.62 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.
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: rtfps.c,v 1.62 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
44 #include <sys/bus.h>
45 #include <sys/intr.h>
46
47 #include <dev/ic/comreg.h>
48 #include <dev/ic/comvar.h>
49
50 #include <dev/isa/isavar.h>
51 #include <dev/isa/com_multi.h>
52
53 #define NSLAVES 4
54
55 struct rtfps_softc {
56 void *sc_ih;
57
58 bus_space_tag_t sc_iot;
59 int sc_iobase;
60 int sc_irqport;
61 bus_space_handle_t sc_irqioh;
62
63 int sc_alive; /* mask of slave units attached */
64 void *sc_slaves[NSLAVES]; /* com device unit numbers */
65 bus_space_handle_t sc_slaveioh[NSLAVES];
66 };
67
68 int rtfpsprobe(device_t, cfdata_t, void *);
69 void rtfpsattach(device_t, device_t, void *);
70 int rtfpsintr(void *);
71
72 CFATTACH_DECL_NEW(rtfps, sizeof(struct rtfps_softc),
73 rtfpsprobe, rtfpsattach, NULL, NULL);
74
75 int
rtfpsprobe(device_t parent,cfdata_t self,void * aux)76 rtfpsprobe(device_t parent, cfdata_t self, void *aux)
77 {
78 struct isa_attach_args *ia = aux;
79 bus_space_tag_t iot = ia->ia_iot;
80 bus_space_handle_t ioh;
81 int i, iobase, rv = 1;
82
83 /*
84 * Do the normal com probe for the first UART and assume
85 * its presence, and the ability to map the other UARTS,
86 * means there is a multiport board there.
87 * XXX Needs more robustness.
88 */
89
90 if (ia->ia_nio < 1)
91 return (0);
92 if (ia->ia_nirq < 1)
93 return (0);
94
95 /* Disallow wildcarded i/o address. */
96 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
97 return (0);
98 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
99 return (0);
100
101 /* if the first port is in use as console, then it. */
102 if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
103 goto checkmappings;
104
105 if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
106 rv = 0;
107 goto out;
108 }
109 rv = comprobe1(iot, ioh);
110 bus_space_unmap(iot, ioh, COM_NPORTS);
111 if (rv == 0)
112 goto out;
113
114 checkmappings:
115 for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
116 iobase += COM_NPORTS;
117
118 if (com_is_console(iot, iobase, 0))
119 continue;
120
121 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
122 rv = 0;
123 goto out;
124 }
125 bus_space_unmap(iot, ioh, COM_NPORTS);
126 }
127
128 out:
129 if (rv) {
130 ia->ia_nio = 1;
131 ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
132
133 ia->ia_nirq = 1;
134
135 ia->ia_niomem = 0;
136 ia->ia_ndrq = 0;
137 }
138 return (rv);
139 }
140
141 void
rtfpsattach(device_t parent,device_t self,void * aux)142 rtfpsattach(device_t parent, device_t self, void *aux)
143 {
144 struct rtfps_softc *sc = device_private(self);
145 struct isa_attach_args *ia = aux;
146 struct commulti_attach_args ca;
147 static int irqport[] = {
148 -1, -1, -1, -1, -1, -1, -1, -1,
149 -1, 0x2f2, 0x6f2, 0x6f3, -1, -1, -1, -1
150 };
151 bus_space_tag_t iot = ia->ia_iot;
152 int i, iobase, irq;
153
154 aprint_naive("\n");
155 aprint_normal("\n");
156
157 sc->sc_iot = ia->ia_iot;
158 sc->sc_iobase = ia->ia_io[0].ir_addr;
159 irq = ia->ia_irq[0].ir_irq;
160
161 if (irq >= 16 || irqport[irq] == -1) {
162 aprint_error_dev(self, "invalid irq\n");
163 return;
164 }
165 sc->sc_irqport = irqport[irq];
166
167 for (i = 0; i < NSLAVES; i++) {
168 iobase = sc->sc_iobase + i * COM_NPORTS;
169 if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
170 bus_space_map(iot, iobase, COM_NPORTS, 0,
171 &sc->sc_slaveioh[i])) {
172 aprint_error_dev(self,
173 "can't map i/o space for slave %d\n", i);
174 return;
175 }
176 }
177 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) {
178 aprint_error_dev(self, "can't map irq port at 0x%x\n",
179 sc->sc_irqport);
180 return;
181 }
182
183 bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
184
185 for (i = 0; i < NSLAVES; i++) {
186 ca.ca_slave = i;
187 ca.ca_iot = sc->sc_iot;
188 ca.ca_ioh = sc->sc_slaveioh[i];
189 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
190 ca.ca_noien = 0;
191
192 sc->sc_slaves[i] = config_found(self, &ca, commultiprint,
193 CFARGS_NONE);
194 if (sc->sc_slaves[i] != NULL)
195 sc->sc_alive |= 1 << i;
196 }
197
198 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE,
199 IPL_SERIAL, rtfpsintr, sc);
200 }
201
202 int
rtfpsintr(void * arg)203 rtfpsintr(void *arg)
204 {
205 struct rtfps_softc *sc = arg;
206 bus_space_tag_t iot = sc->sc_iot;
207 int alive = sc->sc_alive;
208
209 bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
210
211 #define TRY(n) \
212 if (alive & (1 << (n))) \
213 comintr(sc->sc_slaves[n]);
214 TRY(0);
215 TRY(1);
216 TRY(2);
217 TRY(3);
218 #undef TRY
219
220 return (1);
221 }
222