1 /* $OpenBSD: rtfps.c,v 1.19 2002/03/14 01:26:56 millert Exp $ */
2 /* $NetBSD: rtfps.c,v 1.27 1996/10/21 22:41:18 thorpej 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.
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 4
50
51 struct rtfps_softc {
52 struct device sc_dev;
53 void *sc_ih;
54
55 bus_space_tag_t sc_iot;
56 int sc_iobase;
57 int sc_irqport;
58 bus_space_handle_t sc_irqioh;
59
60 int sc_alive; /* mask of slave units attached */
61 void *sc_slaves[NSLAVES]; /* com device unit numbers */
62 bus_space_handle_t sc_slaveioh[NSLAVES];
63 };
64
65 int rtfpsprobe(struct device *, void *, void *);
66 void rtfpsattach(struct device *, struct device *, void *);
67 int rtfpsintr(void *);
68 int rtfpsprint(void *, const char *);
69
70 struct cfattach rtfps_ca = {
71 sizeof(struct rtfps_softc), rtfpsprobe, rtfpsattach
72 };
73
74 struct cfdriver rtfps_cd = {
75 NULL, "rtfps", DV_TTY
76 };
77
78 int
rtfpsprobe(parent,self,aux)79 rtfpsprobe(parent, self, aux)
80 struct device *parent;
81 void *self;
82 void *aux;
83 {
84 struct isa_attach_args *ia = aux;
85 int iobase = ia->ia_iobase;
86 bus_space_tag_t iot = ia->ia_iot;
87 bus_space_handle_t ioh;
88 int i, rv = 1;
89
90 /*
91 * Do the normal com probe for the first UART and assume
92 * its presence, and the ability to map the other UARTS,
93 * means there is a multiport board there.
94 * XXX Needs more robustness.
95 */
96
97 /* if the first port is in use as console, then it. */
98 if (iobase == comconsaddr && !comconsattached)
99 goto checkmappings;
100
101 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
102 rv = 0;
103 goto out;
104 }
105 rv = comprobe1(iot, ioh);
106 bus_space_unmap(iot, ioh, COM_NPORTS);
107 if (rv == 0)
108 goto out;
109
110 checkmappings:
111 for (i = 1; i < NSLAVES; i++) {
112 iobase += COM_NPORTS;
113
114 if (iobase == comconsaddr && !comconsattached)
115 continue;
116
117 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
118 rv = 0;
119 goto out;
120 }
121 bus_space_unmap(iot, ioh, COM_NPORTS);
122 }
123
124 out:
125 if (rv)
126 ia->ia_iosize = NSLAVES * COM_NPORTS;
127 return (rv);
128 }
129
130 int
rtfpsprint(aux,pnp)131 rtfpsprint(aux, pnp)
132 void *aux;
133 const char *pnp;
134 {
135 struct commulti_attach_args *ca = aux;
136
137 if (pnp)
138 printf("com at %s", pnp);
139 printf(" slave %d", ca->ca_slave);
140 return (UNCONF);
141 }
142
143 void
rtfpsattach(parent,self,aux)144 rtfpsattach(parent, self, aux)
145 struct device *parent, *self;
146 void *aux;
147 {
148 struct rtfps_softc *sc = (void *)self;
149 struct isa_attach_args *ia = aux;
150 struct commulti_attach_args ca;
151 static int irqport[] = {
152 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK,
153 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK,
154 IOBASEUNK, 0x2f2, 0x6f2, 0x6f3,
155 IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK
156 };
157 bus_space_tag_t iot = ia->ia_iot;
158 int i;
159
160 sc->sc_iot = ia->ia_iot;
161 sc->sc_iobase = ia->ia_iobase;
162
163 if (ia->ia_irq >= 16 || irqport[ia->ia_irq] == IOBASEUNK)
164 panic("rtfpsattach: invalid irq");
165 sc->sc_irqport = irqport[ia->ia_irq];
166
167 for (i = 0; i < NSLAVES; i++)
168 if (bus_space_map(iot, sc->sc_iobase + i * COM_NPORTS,
169 COM_NPORTS, 0, &sc->sc_slaveioh[i]))
170 panic("rtfpsattach: couldn't map slave %d", i);
171 if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh))
172 panic("rtfpsattach: couldn't map irq port at 0x%x",
173 sc->sc_irqport);
174
175 bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
176
177 printf("\n");
178
179 for (i = 0; i < NSLAVES; i++) {
180 ca.ca_slave = i;
181 ca.ca_iot = sc->sc_iot;
182 ca.ca_ioh = sc->sc_slaveioh[i];
183 ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
184 ca.ca_noien = 0;
185
186 sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint);
187 if (sc->sc_slaves[i] != NULL)
188 sc->sc_alive |= 1 << i;
189 }
190
191 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
192 IPL_TTY, rtfpsintr, sc, sc->sc_dev.dv_xname);
193 }
194
195 int
rtfpsintr(arg)196 rtfpsintr(arg)
197 void *arg;
198 {
199 struct rtfps_softc *sc = arg;
200 bus_space_tag_t iot = sc->sc_iot;
201 int alive = sc->sc_alive;
202
203 bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
204
205 #define TRY(n) \
206 if (alive & (1 << (n))) \
207 comintr(sc->sc_slaves[n]);
208 TRY(0);
209 TRY(1);
210 TRY(2);
211 TRY(3);
212 #undef TRY
213
214 return (1);
215 }
216