1/*	$NetBSD: com_ebus.c,v 1.15 2008/04/28 20:23:35 martin Exp $ */
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles M. Hannum.
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_ebus.c,v 1.15 2008/04/28 20:23:35 martin Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/device.h>
38#include <sys/termios.h>
39
40#include <sys/bus.h>
41#include <machine/autoconf.h>
42#include <machine/intr.h>
43
44#include <dev/ebus/ebusreg.h>
45#include <dev/ebus/ebusvar.h>
46
47#include <dev/ic/comreg.h>
48#include <dev/ic/comvar.h>
49
50struct com_ebus_softc {
51	struct com_softc ebsc_com;	/* real "com" softc */
52
53	/* this space for rent */
54};
55
56static int com_ebus_match(device_t, cfdata_t , void *);
57static void com_ebus_attach(device_t, device_t, void *);
58
59CFATTACH_DECL_NEW(com_ebus, sizeof(struct com_ebus_softc),
60    com_ebus_match, com_ebus_attach, NULL, NULL);
61
62static int
63com_ebus_match(device_t parent, cfdata_t cf, void *aux)
64{
65	struct ebus_attach_args *ea = aux;
66	bus_space_handle_t ioh;
67	int match;
68
69	if (strcmp(ea->ea_name, "su") != 0)
70		return (0);
71
72	match = 0;
73	if (bus_space_map(ea->ea_bustag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
74			  ea->ea_reg[0].size, 0, &ioh) == 0)
75	{
76		match = comprobe1(ea->ea_bustag, ioh);
77		bus_space_unmap(ea->ea_bustag, ioh, ea->ea_reg[0].size);
78	}
79
80	return (match);
81}
82
83static void
84com_ebus_attach(device_t parent, device_t self, void *aux)
85{
86	struct com_ebus_softc *ebsc = device_private(self);
87	struct com_softc *sc = &ebsc->ebsc_com;
88	struct ebus_attach_args *ea = aux;
89	bus_space_tag_t iot;
90	bus_space_handle_t ioh;
91	bus_addr_t iobase;
92
93	sc->sc_dev = self;
94	iot = ea->ea_bustag;
95	iobase = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]);
96	sc->sc_frequency = COM_FREQ;
97	sc->sc_hwflags = COM_HW_NO_TXPRELOAD;
98
99	/*
100	 * XXX: It would be nice to be able to split console input and
101	 * output to different devices.  For now switch to serial
102	 * console if PROM stdin is on serial (so that we can use DDB).
103	 */
104	if (prom_instance_to_package(prom_stdin()) == ea->ea_node)
105		comcnattach(iot, iobase, B9600, sc->sc_frequency,
106		    COM_TYPE_NORMAL, (CLOCAL | CREAD | CS8));
107
108	if (!com_is_console(iot, iobase, &ioh)
109	    && bus_space_map(iot, iobase, ea->ea_reg[0].size,
110			     0, &ioh) != 0)
111	{
112		aprint_error(": unable to map device registers\n");
113		return;
114	}
115
116	COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
117
118	com_attach_subr(sc);
119
120	if (ea->ea_nintr != 0)
121		(void)bus_intr_establish(iot, ea->ea_intr[0], IPL_SERIAL,
122					 comintr, sc);
123}
124