rtfps.c revision 1.41 
1/*	$NetBSD: rtfps.c,v 1.41 2001/11/13 08:01:29 lukem 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 1.41 2001/11/13 08:01:29 lukem 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 <machine/bus.h>
45#include <machine/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
55struct rtfps_softc {
56	struct device sc_dev;
57	void *sc_ih;
58
59	bus_space_tag_t sc_iot;
60	int sc_iobase;
61	int sc_irqport;
62	bus_space_handle_t sc_irqioh;
63
64	int sc_alive;			/* mask of slave units attached */
65	void *sc_slaves[NSLAVES];	/* com device unit numbers */
66	bus_space_handle_t sc_slaveioh[NSLAVES];
67};
68
69int rtfpsprobe __P((struct device *, struct cfdata *, void *));
70void rtfpsattach __P((struct device *, struct device *, void *));
71int rtfpsintr __P((void *));
72int rtfpsprint __P((void *, const char *));
73
74struct cfattach rtfps_ca = {
75	sizeof(struct rtfps_softc), rtfpsprobe, rtfpsattach
76};
77
78int
79rtfpsprobe(parent, self, aux)
80	struct device *parent;
81	struct cfdata *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	/* Disallow wildcarded i/o address. */
98	if (ia->ia_iobase == ISACF_PORT_DEFAULT)
99		return (0);
100
101	/* if the first port is in use as console, then it. */
102	if (com_is_console(iot, iobase, 0))
103		goto checkmappings;
104
105	if (bus_space_map(iot, iobase, 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
114checkmappings:
115	for (i = 1; 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
128out:
129	if (rv)
130		ia->ia_iosize = NSLAVES * COM_NPORTS;
131	return (rv);
132}
133
134int
135rtfpsprint(aux, pnp)
136	void *aux;
137	const char *pnp;
138{
139	struct commulti_attach_args *ca = aux;
140
141	if (pnp)
142		printf("com at %s", pnp);
143	printf(" slave %d", ca->ca_slave);
144	return (UNCONF);
145}
146
147void
148rtfpsattach(parent, self, aux)
149	struct device *parent, *self;
150	void *aux;
151{
152	struct rtfps_softc *sc = (void *)self;
153	struct isa_attach_args *ia = aux;
154	struct commulti_attach_args ca;
155	static int irqport[] = {
156		IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK,
157		IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK,
158		IOBASEUNK,     0x2f2,     0x6f2,     0x6f3,
159		IOBASEUNK, IOBASEUNK, IOBASEUNK, IOBASEUNK
160	};
161	bus_space_tag_t iot = ia->ia_iot;
162	int i, iobase;
163
164	printf("\n");
165
166	sc->sc_iot = ia->ia_iot;
167	sc->sc_iobase = ia->ia_iobase;
168
169	if (ia->ia_irq >= 16 || irqport[ia->ia_irq] == IOBASEUNK) {
170		printf("%s: invalid irq\n", sc->sc_dev.dv_xname);
171		return;
172	}
173	sc->sc_irqport = irqport[ia->ia_irq];
174
175	for (i = 0; i < NSLAVES; i++) {
176		iobase = sc->sc_iobase + i * COM_NPORTS;
177		if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
178		    bus_space_map(iot, iobase, COM_NPORTS, 0,
179			&sc->sc_slaveioh[i])) {
180			printf("%s: can't map i/o space for slave %d\n",
181			    sc->sc_dev.dv_xname, i);
182			return;
183		}
184	}
185	if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) {
186		printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname,
187		    sc->sc_irqport);
188		return;
189	}
190
191	bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
192
193	for (i = 0; i < NSLAVES; i++) {
194		ca.ca_slave = i;
195		ca.ca_iot = sc->sc_iot;
196		ca.ca_ioh = sc->sc_slaveioh[i];
197		ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
198		ca.ca_noien = 0;
199
200		sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint);
201		if (sc->sc_slaves[i] != NULL)
202			sc->sc_alive |= 1 << i;
203	}
204
205	sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
206	    IPL_SERIAL, rtfpsintr, sc);
207}
208
209int
210rtfpsintr(arg)
211	void *arg;
212{
213	struct rtfps_softc *sc = arg;
214	bus_space_tag_t iot = sc->sc_iot;
215	int alive = sc->sc_alive;
216
217	bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
218
219#define	TRY(n) \
220	if (alive & (1 << (n))) \
221		comintr(sc->sc_slaves[n]);
222	TRY(0);
223	TRY(1);
224	TRY(2);
225	TRY(3);
226#undef TRY
227
228	return (1);
229}
230