1/*	$NetBSD: com_iop.c,v 1.3 2008/04/28 20:23:34 martin 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: com_iop.c,v 1.3 2008/04/28 20:23:34 martin Exp $");
34
35#include <sys/param.h>
36#include <sys/device.h>
37#include <sys/ioctl.h>
38#include <sys/tty.h>
39#include <sys/bus.h>
40
41#include <machine/intr.h>
42
43#include <dev/ic/comreg.h>
44#include <dev/ic/comvar.h>
45
46#include <dev/mca/mcavar.h>
47#include <dev/mca/mcadevs.h>
48
49#include <rs6000/ioplanar/ioplanarvar.h>
50
51struct com_iop_softc {
52	struct	com_softc sc_com;	/* real com softc */
53	void *sc_ih;
54};
55
56int com_iop_probe(device_t, cfdata_t , void *);
57void com_iop_attach(device_t, device_t, void *);
58
59CFATTACH_DECL_NEW(com_iop, sizeof(struct com_iop_softc),
60    com_iop_probe, com_iop_attach, NULL, NULL);
61
62#define COM_RAINBOW_FREQ	8000000
63
64/*
65 * This probe is very unorthodox.  Basically, we have no way to actually
66 * probe the device, so instead, we check that the specific device should
67 * exist on the ioplanar, and just return true.
68 */
69
70int
71com_iop_probe(device_t parent, cfdata_t match, void *aux)
72{
73	struct ioplanar_dev_attach_args *idaa = aux;
74
75	if (idaa->idaa_devid == MCA_PRODUCT_IBM_SIO_RAINBOW &&
76	    (idaa->idaa_device == IOP_COM0 || idaa->idaa_device == IOP_COM1))
77		return 1;
78
79	return 0;
80}
81
82void
83com_iop_attach(device_t parent, device_t self, void *aux)
84{
85	struct com_iop_softc *isc = device_private(self);
86	struct com_softc *sc = &isc->sc_com;
87	int iobase, irq;
88	struct ioplanar_dev_attach_args *idaa = aux;
89	bus_space_handle_t ioh;
90
91	sc->sc_dev = self;
92
93	switch (idaa->idaa_devid) {
94	case MCA_PRODUCT_IBM_SIO_RAINBOW:
95		switch (idaa->idaa_device) {
96		case IOP_COM0:
97			iobase = 0x30;
98			irq = 2; /* ??? */
99			sc->sc_frequency = COM_RAINBOW_FREQ;
100			break;
101		case IOP_COM1:
102			iobase = 0x38;
103			irq = 2; /* ??? */
104			sc->sc_frequency = COM_RAINBOW_FREQ;
105			break;
106		default:
107			return;
108		}
109		break;
110	default:
111		return;
112	}
113	if (!com_is_console(idaa->idaa_iot, iobase, &ioh) &&
114	    bus_space_map(idaa->idaa_iot, iobase, COM_NPORTS, 0, &ioh)) {
115		aprint_error(": can't map i/o space\n");
116		return;
117	}
118
119	COM_INIT_REGS(sc->sc_regs, idaa->idaa_iot, ioh, iobase);
120
121	aprint_normal("i/o %#x-%#x irq %d", iobase, iobase + COM_NPORTS - 1,
122	    irq);
123
124	com_attach_subr(sc);
125
126	isc->sc_ih = mca_intr_establish(idaa->idaa_mc, irq, IPL_SERIAL,
127	    comintr, sc);
128
129	if (isc->sc_ih == NULL) {
130		aprint_error_dev(self,
131		    "couldn't establish interrupt handler\n");
132		return;
133	}
134}
135