obio.c revision 330897 
1/*	$NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-4-Clause
5 *
6 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
7 * All rights reserved.
8 *
9 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed for the NetBSD Project by
22 *	Wasabi Systems, Inc.
23 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
24 *    or promote products derived from this software without specific prior
25 *    written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40/*
41 * On-board device autoconfiguration support for Intel IQ80321
42 * evaluation boards.
43 */
44
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD: stable/11/sys/mips/malta/obio.c 330897 2018-03-14 03:19:51Z eadler $");
47
48#include <sys/param.h>
49#include <sys/systm.h>
50#include <sys/bus.h>
51#include <sys/kernel.h>
52#include <sys/module.h>
53#include <sys/rman.h>
54#include <sys/malloc.h>
55
56#include <machine/bus.h>
57
58#include <mips/malta/maltareg.h>
59#include <mips/malta/obiovar.h>
60
61int	obio_probe(device_t);
62int	obio_attach(device_t);
63
64/*
65 * A bit tricky and hackish. Since we need OBIO to rely
66 * on PCI we make it pseudo-pci device. But there should
67 * be only one such device, so we use this static flag
68 * to prevent false positives on every real PCI device probe.
69 */
70static int have_one = 0;
71
72int
73obio_probe(device_t dev)
74{
75	if (!have_one) {
76		have_one = 1;
77		return 0;
78	}
79	return (ENXIO);
80}
81
82int
83obio_attach(device_t dev)
84{
85	struct obio_softc *sc = device_get_softc(dev);
86
87	sc->oba_st = mips_bus_space_generic;
88	sc->oba_addr = MIPS_PHYS_TO_KSEG1(MALTA_UART0ADR);
89	sc->oba_size = MALTA_PCIMEM3_SIZE;
90	sc->oba_rman.rm_type = RMAN_ARRAY;
91	sc->oba_rman.rm_descr = "OBIO I/O";
92	if (rman_init(&sc->oba_rman) != 0 ||
93	    rman_manage_region(&sc->oba_rman,
94	    sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
95		panic("obio_attach: failed to set up I/O rman");
96	sc->oba_irq_rman.rm_type = RMAN_ARRAY;
97	sc->oba_irq_rman.rm_descr = "OBIO IRQ";
98
99	/*
100	 * This module is intended for UART purposes only and
101	 * it's IRQ is 4
102	 */
103	if (rman_init(&sc->oba_irq_rman) != 0 ||
104	    rman_manage_region(&sc->oba_irq_rman, 4, 4) != 0)
105		panic("obio_attach: failed to set up IRQ rman");
106
107	device_add_child(dev, "uart", 0);
108	bus_generic_probe(dev);
109	bus_generic_attach(dev);
110
111	return (0);
112}
113
114static struct resource *
115obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
116    rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
117{
118	struct resource *rv;
119	struct rman *rm;
120	bus_space_tag_t bt = 0;
121	bus_space_handle_t bh = 0;
122	struct obio_softc *sc = device_get_softc(bus);
123
124	switch (type) {
125	case SYS_RES_IRQ:
126		rm = &sc->oba_irq_rman;
127		break;
128	case SYS_RES_MEMORY:
129		return (NULL);
130	case SYS_RES_IOPORT:
131		rm = &sc->oba_rman;
132		bt = sc->oba_st;
133		bh = sc->oba_addr;
134		start = bh;
135		break;
136	default:
137		return (NULL);
138	}
139
140
141	rv = rman_reserve_resource(rm, start, end, count, flags, child);
142	if (rv == NULL)
143		return (NULL);
144	if (type == SYS_RES_IRQ)
145		return (rv);
146	rman_set_rid(rv, *rid);
147	rman_set_bustag(rv, bt);
148	rman_set_bushandle(rv, bh);
149
150	if (0) {
151		if (bus_activate_resource(child, type, *rid, rv)) {
152			rman_release_resource(rv);
153			return (NULL);
154		}
155	}
156	return (rv);
157
158}
159
160static int
161obio_activate_resource(device_t bus, device_t child, int type, int rid,
162    struct resource *r)
163{
164	return (0);
165}
166static device_method_t obio_methods[] = {
167	DEVMETHOD(device_probe, obio_probe),
168	DEVMETHOD(device_attach, obio_attach),
169
170	DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
171	DEVMETHOD(bus_activate_resource, obio_activate_resource),
172	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
173	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
174
175	{0, 0},
176};
177
178static driver_t obio_driver = {
179	"obio",
180	obio_methods,
181	sizeof(struct obio_softc),
182};
183static devclass_t obio_devclass;
184
185DRIVER_MODULE(obio, pci, obio_driver, obio_devclass, 0, 0);
186