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("$FreeBSD$");
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
61 int obio_probe(device_t);
62 int 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 */
70 static int have_one = 0;
71
72 int
obio_probe(device_t dev)73 obio_probe(device_t dev)
74 {
75 if (!have_one) {
76 have_one = 1;
77 return 0;
78 }
79 return (ENXIO);
80 }
81
82 int
obio_attach(device_t dev)83 obio_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
114 static struct resource *
obio_alloc_resource(device_t bus,device_t child,int type,int * rid,rman_res_t start,rman_res_t end,rman_res_t count,u_int flags)115 obio_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 rv = rman_reserve_resource(rm, start, end, count, flags, child);
141 if (rv == NULL)
142 return (NULL);
143 if (type == SYS_RES_IRQ)
144 return (rv);
145 rman_set_rid(rv, *rid);
146 rman_set_bustag(rv, bt);
147 rman_set_bushandle(rv, bh);
148
149 if (0) {
150 if (bus_activate_resource(child, type, *rid, rv)) {
151 rman_release_resource(rv);
152 return (NULL);
153 }
154 }
155 return (rv);
156
157 }
158
159 static int
obio_activate_resource(device_t bus,device_t child,int type,int rid,struct resource * r)160 obio_activate_resource(device_t bus, device_t child, int type, int rid,
161 struct resource *r)
162 {
163 return (0);
164 }
165 static device_method_t obio_methods[] = {
166 DEVMETHOD(device_probe, obio_probe),
167 DEVMETHOD(device_attach, obio_attach),
168
169 DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
170 DEVMETHOD(bus_activate_resource, obio_activate_resource),
171 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
172 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
173
174 {0, 0},
175 };
176
177 static driver_t obio_driver = {
178 "obio",
179 obio_methods,
180 sizeof(struct obio_softc),
181 };
182 static devclass_t obio_devclass;
183
184 DRIVER_MODULE(obio, pci, obio_driver, obio_devclass, 0, 0);
185