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