Annotation of sys/dev/isa/boca.c, Revision 1.1.1.1
1.1 nbrk 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: }
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