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
59 int obio_probe(device_t);
60 int 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 */
68 static int have_one = 0;
69
70 int
obio_probe(device_t dev)71 obio_probe(device_t dev)
72 {
73 if (!have_one) {
74 have_one = 1;
75 return 0;
76 }
77 return (ENXIO);
78 }
79
80 int
obio_attach(device_t dev)81 obio_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
112 static struct resource *
obio_alloc_resource(device_t bus,device_t child,int type,int * rid,u_long start,u_long end,u_long count,u_int flags)113 obio_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
158 static int
obio_activate_resource(device_t bus,device_t child,int type,int rid,struct resource * r)159 obio_activate_resource(device_t bus, device_t child, int type, int rid,
160 struct resource *r)
161 {
162 return (0);
163 }
164 static 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
176 static driver_t obio_driver = {
177 "obio",
178 obio_methods,
179 sizeof(struct obio_softc),
180 };
181 static devclass_t obio_devclass;
182
183 DRIVER_MODULE(obio, pci, obio_driver, obio_devclass, 0, 0);
184