rtfps.c revision 1.42 
1/*	$NetBSD: rtfps.c,v 1.42 2002/01/07 21:47:12 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 1.42 2002/01/07 21:47:12 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 <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	bus_space_tag_t iot = ia->ia_iot;
86	bus_space_handle_t ioh;
87	int i, iobase, rv = 1;
88
89	/*
90	 * Do the normal com probe for the first UART and assume
91	 * its presence, and the ability to map the other UARTS,
92	 * means there is a multiport board there.
93	 * XXX Needs more robustness.
94	 */
95
96	if (ia->ia_nio < 1)
97		return (0);
98	if (ia->ia_nirq < 1)
99		return (0);
100
101	/* Disallow wildcarded i/o address. */
102	if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
103		return (0);
104	if (ia->ia_irq[0].ir_irq == ISACF_IRQ_DEFAULT)
105		return (0);
106
107	/* if the first port is in use as console, then it. */
108	if (com_is_console(iot, ia->ia_io[0].ir_addr, 0))
109		goto checkmappings;
110
111	if (bus_space_map(iot, ia->ia_io[0].ir_addr, COM_NPORTS, 0, &ioh)) {
112		rv = 0;
113		goto out;
114	}
115	rv = comprobe1(iot, ioh);
116	bus_space_unmap(iot, ioh, COM_NPORTS);
117	if (rv == 0)
118		goto out;
119
120checkmappings:
121	for (i = 1, iobase = ia->ia_io[0].ir_addr; i < NSLAVES; i++) {
122		iobase += COM_NPORTS;
123
124		if (com_is_console(iot, iobase, 0))
125			continue;
126
127		if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
128			rv = 0;
129			goto out;
130		}
131		bus_space_unmap(iot, ioh, COM_NPORTS);
132	}
133
134out:
135	if (rv) {
136		ia->ia_nio = 1;
137		ia->ia_io[0].ir_size = NSLAVES * COM_NPORTS;
138
139		ia->ia_nirq = 1;
140
141		ia->ia_niomem = 0;
142		ia->ia_ndrq = 0;
143	}
144	return (rv);
145}
146
147int
148rtfpsprint(aux, pnp)
149	void *aux;
150	const char *pnp;
151{
152	struct commulti_attach_args *ca = aux;
153
154	if (pnp)
155		printf("com at %s", pnp);
156	printf(" slave %d", ca->ca_slave);
157	return (UNCONF);
158}
159
160void
161rtfpsattach(parent, self, aux)
162	struct device *parent, *self;
163	void *aux;
164{
165	struct rtfps_softc *sc = (void *)self;
166	struct isa_attach_args *ia = aux;
167	struct commulti_attach_args ca;
168	static int irqport[] = {
169		ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
170		ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
171		ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
172		0x2f2,              0x6f2,              0x6f3,
173		ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT, ISACF_PORT_DEFAULT,
174		ISACF_PORT_DEFAULT
175	};
176	bus_space_tag_t iot = ia->ia_iot;
177	int i, iobase, irq;
178
179	printf("\n");
180
181	sc->sc_iot = ia->ia_iot;
182	sc->sc_iobase = ia->ia_io[0].ir_addr;
183	irq = ia->ia_irq[0].ir_irq;
184
185	if (irq >= 16 || irqport[irq] == ISACF_PORT_DEFAULT) {
186		printf("%s: invalid irq\n", sc->sc_dev.dv_xname);
187		return;
188	}
189	sc->sc_irqport = irqport[irq];
190
191	for (i = 0; i < NSLAVES; i++) {
192		iobase = sc->sc_iobase + i * COM_NPORTS;
193		if (!com_is_console(iot, iobase, &sc->sc_slaveioh[i]) &&
194		    bus_space_map(iot, iobase, COM_NPORTS, 0,
195			&sc->sc_slaveioh[i])) {
196			printf("%s: can't map i/o space for slave %d\n",
197			    sc->sc_dev.dv_xname, i);
198			return;
199		}
200	}
201	if (bus_space_map(iot, sc->sc_irqport, 1, 0, &sc->sc_irqioh)) {
202		printf("%s: can't map irq port at 0x%x\n", sc->sc_dev.dv_xname,
203		    sc->sc_irqport);
204		return;
205	}
206
207	bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
208
209	for (i = 0; i < NSLAVES; i++) {
210		ca.ca_slave = i;
211		ca.ca_iot = sc->sc_iot;
212		ca.ca_ioh = sc->sc_slaveioh[i];
213		ca.ca_iobase = sc->sc_iobase + i * COM_NPORTS;
214		ca.ca_noien = 0;
215
216		sc->sc_slaves[i] = config_found(self, &ca, rtfpsprint);
217		if (sc->sc_slaves[i] != NULL)
218			sc->sc_alive |= 1 << i;
219	}
220
221	sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE,
222	    IPL_SERIAL, rtfpsintr, sc);
223}
224
225int
226rtfpsintr(arg)
227	void *arg;
228{
229	struct rtfps_softc *sc = arg;
230	bus_space_tag_t iot = sc->sc_iot;
231	int alive = sc->sc_alive;
232
233	bus_space_write_1(iot, sc->sc_irqioh, 0, 0);
234
235#define	TRY(n) \
236	if (alive & (1 << (n))) \
237		comintr(sc->sc_slaves[n]);
238	TRY(0);
239	TRY(1);
240	TRY(2);
241	TRY(3);
242#undef TRY
243
244	return (1);
245}
246