Cleanup some of the newbus infrastructure.
[dragonfly.git] / sys / dev / misc / orm / orm.c
CommitLineData
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1/*-
2 * Copyright (c) 2000 Nikolai Saoukh
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/isa/orm.c,v 1.1.2.1 2001/06/19 05:48:29 imp Exp $
39b5d600 27 * $DragonFly: src/sys/dev/misc/orm/orm.c,v 1.4 2005/10/28 03:25:47 dillon Exp $
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28 */
29
30/*
31 * Driver to take care of holes in ISA I/O memory occupied
32 * by option rom(s)
33 */
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/socket.h>
39
40#include <sys/module.h>
41#include <sys/bus.h>
42
43#include <machine/bus.h>
44#include <machine/resource.h>
45#include <sys/rman.h>
46
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47#include <bus/isa/isavar.h>
48#include <bus/isa/pnpvar.h>
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49
50#define IOMEM_START 0x0a0000
51#define IOMEM_STEP 0x000800
52#define IOMEM_END 0x100000
53
54#define ORM_ID 0x00004d3e
55
56static struct isa_pnp_id orm_ids[] = {
57 { ORM_ID, NULL }, /* ORM0000 */
58 { 0, NULL },
59};
60
61#define MAX_ROMS 16
62
63struct orm_softc {
64 int rnum;
65 int rid[MAX_ROMS];
66 struct resource *res[MAX_ROMS];
67};
68
69static int
70orm_probe(device_t dev)
71{
72 return (ISA_PNP_PROBE(device_get_parent(dev), dev, orm_ids));
73}
74
75static int
76orm_attach(device_t dev)
77{
78 return (0);
79}
80
39b5d600 81static int
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82orm_identify(driver_t* driver, device_t parent)
83{
84 bus_space_handle_t bh;
85 bus_space_tag_t bt;
86 device_t child;
87 u_int32_t chunk = IOMEM_START;
88 struct resource *res;
89 int rid;
90 u_int32_t rom_size;
91 struct orm_softc *sc;
92 u_int8_t buf[3];
93
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94 /*
95 * rescanning the isa bus, do nothing
96 */
97 if (device_get_state(parent) == DS_ATTACHED)
98 return (0);
99
100 /*
101 * Otherwise see if it exists
102 */
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103 child = BUS_ADD_CHILD(parent, ISA_ORDER_SENSITIVE, "orm", -1);
104 device_set_driver(child, driver);
105 isa_set_logicalid(child, ORM_ID);
106 isa_set_vendorid(child, ORM_ID);
107 sc = device_get_softc(child);
108 sc->rnum = 0;
109 while (chunk < IOMEM_END) {
110 bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, chunk,
111 IOMEM_STEP);
112 rid = sc->rnum;
113 res = bus_alloc_resource(child, SYS_RES_MEMORY, &rid, 0ul,
114 ~0ul, IOMEM_STEP, RF_ACTIVE);
115 if (res == NULL) {
116 bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
117 chunk += IOMEM_STEP;
118 continue;
119 }
120 bt = rman_get_bustag(res);
121 bh = rman_get_bushandle(res);
122 bus_space_read_region_1(bt, bh, 0, buf, sizeof(buf));
123
124 /*
125 * We need to release and delete the resource since we're
126 * changing its size, or the rom isn't there. There
127 * is a checksum field in the ROM to prevent false
128 * positives. However, some common hardware (IBM thinkpads)
129 * neglects to put a valid checksum in the ROM, so we do
130 * not double check the checksum here. On the ISA bus
131 * areas that have no hardware read back as 0xff, so the
132 * tests to see if we have 0x55 followed by 0xaa are
133 * generally sufficient.
134 */
135 bus_release_resource(child, SYS_RES_MEMORY, rid, res);
136 bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
137 if (buf[0] != 0x55 || buf[1] != 0xAA || (buf[2] & 0x03) != 0) {
138 chunk += IOMEM_STEP;
139 continue;
140 }
141 rom_size = buf[2] << 9;
142 bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, chunk,
143 rom_size);
144 rid = sc->rnum;
145 res = bus_alloc_resource(child, SYS_RES_MEMORY, &rid, 0ul,
146 ~0ul, rom_size, 0);
147 if (res == NULL) {
148 bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
149 chunk += IOMEM_STEP;
150 continue;
151 }
152 sc->rid[sc->rnum] = rid;
153 sc->res[sc->rnum] = res;
154 sc->rnum++;
155 chunk += rom_size;
156 }
157
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158 /*
159 * note: sc becomes invalid after we delete the child.
160 */
161 if (sc->rnum == 0) {
984263bc 162 device_delete_child(parent, child);
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163 return (ENXIO);
164 }
165 if (sc->rnum == 1)
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166 device_set_desc(child, "Option ROM");
167 else
168 device_set_desc(child, "Option ROMs");
39b5d600 169 return (0);
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170}
171
172static int
173orm_detach(device_t dev)
174{
175 int i;
176 struct orm_softc *sc = device_get_softc(dev);
177
178 for (i = 0; i < sc->rnum; i++)
179 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid[i],
180 sc->res[i]);
181 return (0);
182}
183
184static device_method_t orm_methods[] = {
185 /* Device interface */
186 DEVMETHOD(device_identify, orm_identify),
187 DEVMETHOD(device_probe, orm_probe),
188 DEVMETHOD(device_attach, orm_attach),
189 DEVMETHOD(device_detach, orm_detach),
190 { 0, 0 }
191};
192
193static driver_t orm_driver = {
194 "orm",
195 orm_methods,
196 sizeof (struct orm_softc)
197};
198
199static devclass_t orm_devclass;
200
201DRIVER_MODULE(orm, isa, orm_driver, orm_devclass, 0, 0);