1/*	$NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $	*/
2
3/*-
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed for the NetBSD Project by
20 *	Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * On-board device autoconfiguration support for Intel IQ80321
40 * evaluation boards.
41 */
42
43#include <sys/cdefs.h>
44__FBSDID("$FreeBSD$");
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/bus.h>
49#include <sys/kernel.h>
50#include <sys/module.h>
51#include <sys/rman.h>
52#include <sys/malloc.h>
53
54#include <machine/bus.h>
55
56#include <mips/malta/maltareg.h>
57#include <mips/malta/obiovar.h>
58
59int	obio_probe(device_t);
60int	obio_attach(device_t);
61
62/*
63 * A bit tricky and hackish. Since we need OBIO to rely
64 * on PCI we make it pseudo-pci device. But there should
65 * be only one such device, so we use this static flag
66 * to prevent false positives on every real PCI device probe.
67 */
68static int have_one = 0;
69
70int
71obio_probe(device_t dev)
72{
73	if (!have_one) {
74		have_one = 1;
75		return 0;
76	}
77	return (ENXIO);
78}
79
80int
81obio_attach(device_t dev)
82{
83	struct obio_softc *sc = device_get_softc(dev);
84
85	sc->oba_st = mips_bus_space_generic;
86	sc->oba_addr = MIPS_PHYS_TO_KSEG1(MALTA_UART0ADR);
87	sc->oba_size = MALTA_PCIMEM3_SIZE;
88	sc->oba_rman.rm_type = RMAN_ARRAY;
89	sc->oba_rman.rm_descr = "OBIO I/O";
90	if (rman_init(&sc->oba_rman) != 0 ||
91	    rman_manage_region(&sc->oba_rman,
92	    sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
93		panic("obio_attach: failed to set up I/O rman");
94	sc->oba_irq_rman.rm_type = RMAN_ARRAY;
95	sc->oba_irq_rman.rm_descr = "OBIO IRQ";
96
97	/*
98	 * This module is intended for UART purposes only and
99	 * it's IRQ is 4
100	 */
101	if (rman_init(&sc->oba_irq_rman) != 0 ||
102	    rman_manage_region(&sc->oba_irq_rman, 4, 4) != 0)
103		panic("obio_attach: failed to set up IRQ rman");
104
105	device_add_child(dev, "uart", 0);
106	bus_generic_probe(dev);
107	bus_generic_attach(dev);
108
109	return (0);
110}
111
112static struct resource *
113obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
114    u_long start, u_long end, u_long count, u_int flags)
115{
116	struct resource *rv;
117	struct rman *rm;
118	bus_space_tag_t bt = 0;
119	bus_space_handle_t bh = 0;
120	struct obio_softc *sc = device_get_softc(bus);
121
122	switch (type) {
123	case SYS_RES_IRQ:
124		rm = &sc->oba_irq_rman;
125		break;
126	case SYS_RES_MEMORY:
127		return (NULL);
128	case SYS_RES_IOPORT:
129		rm = &sc->oba_rman;
130		bt = sc->oba_st;
131		bh = sc->oba_addr;
132		start = bh;
133		break;
134	default:
135		return (NULL);
136	}
137
138
139	rv = rman_reserve_resource(rm, start, end, count, flags, child);
140	if (rv == NULL)
141		return (NULL);
142	if (type == SYS_RES_IRQ)
143		return (rv);
144	rman_set_rid(rv, *rid);
145	rman_set_bustag(rv, bt);
146	rman_set_bushandle(rv, bh);
147
148	if (0) {
149		if (bus_activate_resource(child, type, *rid, rv)) {
150			rman_release_resource(rv);
151			return (NULL);
152		}
153	}
154	return (rv);
155
156}
157
158static int
159obio_activate_resource(device_t bus, device_t child, int type, int rid,
160    struct resource *r)
161{
162	return (0);
163}
164static device_method_t obio_methods[] = {
165	DEVMETHOD(device_probe, obio_probe),
166	DEVMETHOD(device_attach, obio_attach),
167
168	DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
169	DEVMETHOD(bus_activate_resource, obio_activate_resource),
170	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
171	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
172
173	{0, 0},
174};
175
176static driver_t obio_driver = {
177	"obio",
178	obio_methods,
179	sizeof(struct obio_softc),
180};
181static devclass_t obio_devclass;
182
183DRIVER_MODULE(obio, pci, obio_driver, obio_devclass, 0, 0);
184