com_iop.c revision 1.1 
1/*	$NetBSD: com_iop.c,v 1.1 2007/12/17 19:09:38 garbled Exp $	*/
2
3/*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tim Rightnour
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 the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: com_iop.c,v 1.1 2007/12/17 19:09:38 garbled Exp $");
41
42#include <sys/param.h>
43#include <sys/device.h>
44#include <sys/ioctl.h>
45#include <sys/tty.h>
46
47#include <machine/intr.h>
48#include <machine/bus.h>
49
50#include <dev/ic/comreg.h>
51#include <dev/ic/comvar.h>
52
53#include <dev/mca/mcavar.h>
54#include <dev/mca/mcadevs.h>
55
56#include <rs6000/ioplanar/ioplanarvar.h>
57
58struct com_iop_softc {
59	struct	com_softc sc_com;	/* real com softc */
60	void *sc_ih;
61};
62
63int com_iop_probe(struct device *, struct cfdata *, void *);
64void com_iop_attach(struct device *, struct device *, void *);
65
66CFATTACH_DECL(com_iop, sizeof(struct com_iop_softc),
67    com_iop_probe, com_iop_attach, NULL, NULL);
68
69#define COM_RAINBOW_FREQ	8000000
70
71/*
72 * This probe is very unorthodox.  Basically, we have no way to actually
73 * probe the device, so instead, we check that the specific device should
74 * exist on the ioplanar, and just return true.
75 */
76
77int
78com_iop_probe(struct device *parent, struct cfdata *match, void *aux)
79{
80	struct ioplanar_dev_attach_args *idaa = aux;
81
82	if (idaa->idaa_devid == MCA_PRODUCT_IBM_SIO_RAINBOW &&
83	    (idaa->idaa_device == IOP_COM0 || idaa->idaa_device == IOP_COM1))
84		return 1;
85
86	return 0;
87}
88
89void
90com_iop_attach(struct device *parent, struct device *self, void *aux)
91{
92	struct com_iop_softc *isc = device_private(self);
93	struct com_softc *sc = &isc->sc_com;
94	int iobase, irq;
95	struct ioplanar_dev_attach_args *idaa = aux;
96	bus_space_handle_t ioh;
97
98	switch (idaa->idaa_devid) {
99	case MCA_PRODUCT_IBM_SIO_RAINBOW:
100		switch (idaa->idaa_device) {
101		case IOP_COM0:
102			iobase = 0x30;
103			irq = 2; /* ??? */
104			sc->sc_frequency = COM_RAINBOW_FREQ;
105			break;
106		case IOP_COM1:
107			iobase = 0x38;
108			irq = 2; /* ??? */
109			sc->sc_frequency = COM_RAINBOW_FREQ;
110			break;
111		default:
112			return;
113		}
114		break;
115	default:
116		return;
117	}
118	if (!com_is_console(idaa->idaa_iot, iobase, &ioh) &&
119	    bus_space_map(idaa->idaa_iot, iobase, COM_NPORTS, 0, &ioh)) {
120		aprint_error(": can't map i/o space\n");
121		return;
122	}
123
124	COM_INIT_REGS(sc->sc_regs, idaa->idaa_iot, ioh, iobase);
125
126	aprint_normal("i/o %#x-%#x irq %d", iobase, iobase + COM_NPORTS - 1,
127	    irq);
128
129	com_attach_subr(sc);
130
131	isc->sc_ih = mca_intr_establish(idaa->idaa_mc, irq, IPL_SERIAL,
132	    comintr, sc);
133
134	if (isc->sc_ih == NULL) {
135		aprint_error("%s: couldn't establish interrupt handler\n",
136		    sc->sc_dev.dv_xname);
137		return;
138	}
139}
140