FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/legacy.c
1 /*
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/5.0/sys/i386/i386/legacy.c 104224 2002-09-30 18:47:11Z jhb $
30 */
31
32 /*
33 * This code implements a system driver for legacy systems that do not
34 * support ACPI or when ACPI support is not present in the kernel.
35 */
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/bus.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <machine/bus.h>
43 #include <sys/rman.h>
44
45 #include <machine/legacyvar.h>
46 #include <machine/resource.h>
47
48 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
49 struct legacy_device {
50 struct resource_list lg_resources;
51 int lg_pcibus;
52 };
53
54 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
55
56 static void legacy_identify(driver_t *driver, device_t parent);
57 static int legacy_probe(device_t);
58 static int legacy_attach(device_t);
59 static int legacy_print_child(device_t, device_t);
60 static device_t legacy_add_child(device_t bus, int order, const char *name,
61 int unit);
62 static struct resource *legacy_alloc_resource(device_t, device_t, int, int *,
63 u_long, u_long, u_long, u_int);
64 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
65 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
66 static int legacy_release_resource(device_t, device_t, int, int,
67 struct resource *);
68 static int legacy_set_resource(device_t, device_t, int, int, u_long, u_long);
69 static int legacy_get_resource(device_t, device_t, int, int, u_long *, u_long *);
70 static void legacy_delete_resource(device_t, device_t, int, int);
71
72 static device_method_t legacy_methods[] = {
73 /* Device interface */
74 DEVMETHOD(device_identify, legacy_identify),
75 DEVMETHOD(device_probe, legacy_probe),
76 DEVMETHOD(device_attach, legacy_attach),
77 DEVMETHOD(device_detach, bus_generic_detach),
78 DEVMETHOD(device_shutdown, bus_generic_shutdown),
79 DEVMETHOD(device_suspend, bus_generic_suspend),
80 DEVMETHOD(device_resume, bus_generic_resume),
81
82 /* Bus interface */
83 DEVMETHOD(bus_print_child, legacy_print_child),
84 DEVMETHOD(bus_add_child, legacy_add_child),
85 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
86 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
87 DEVMETHOD(bus_set_resource, legacy_set_resource),
88 DEVMETHOD(bus_get_resource, legacy_get_resource),
89 DEVMETHOD(bus_alloc_resource, legacy_alloc_resource),
90 DEVMETHOD(bus_release_resource, legacy_release_resource),
91 DEVMETHOD(bus_delete_resource, legacy_delete_resource),
92 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
93 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
94 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
95 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
96
97 { 0, 0 }
98 };
99
100 static driver_t legacy_driver = {
101 "legacy",
102 legacy_methods,
103 1, /* no softc */
104 };
105 static devclass_t legacy_devclass;
106
107 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
108
109 static void
110 legacy_identify(driver_t *driver, device_t parent)
111 {
112
113 /*
114 * Add child device with order of 1 so it gets probed
115 * after ACPI (which is at order 0.
116 */
117 if (BUS_ADD_CHILD(parent, 1, "legacy", 0) == NULL)
118 panic("legacy: could not attach");
119 }
120
121 static int
122 legacy_probe(device_t dev)
123 {
124 device_t acpi;
125
126 /*
127 * Fail to probe if ACPI is ok.
128 */
129 acpi = devclass_get_device(devclass_find("acpi"), 0);
130 if (acpi != NULL && device_is_alive(acpi))
131 return (ENXIO);
132 device_set_desc(dev, "legacy system");
133 device_quiet(dev);
134 return (0);
135 }
136
137 static int
138 legacy_attach(device_t dev)
139 {
140 device_t child;
141
142 /*
143 * First, let our child driver's identify any child devices that
144 * they can find. Once that is done attach any devices that we
145 * found.
146 */
147 bus_generic_probe(dev);
148 bus_generic_attach(dev);
149
150 /*
151 * If we didn't see EISA or ISA on a pci bridge, create some
152 * connection points now so they show up "on motherboard".
153 */
154 if (!devclass_get_device(devclass_find("eisa"), 0)) {
155 child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
156 if (child == NULL)
157 panic("legacy_attach eisa");
158 device_probe_and_attach(child);
159 }
160 if (!devclass_get_device(devclass_find("mca"), 0)) {
161 child = BUS_ADD_CHILD(dev, 0, "mca", 0);
162 if (child == 0)
163 panic("legacy_probe mca");
164 device_probe_and_attach(child);
165 }
166 if (!devclass_get_device(devclass_find("isa"), 0)) {
167 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
168 if (child == NULL)
169 panic("legacy_attach isa");
170 device_probe_and_attach(child);
171 }
172
173 return 0;
174 }
175
176 static int
177 legacy_print_all_resources(device_t dev)
178 {
179 struct legacy_device *atdev = DEVTOAT(dev);
180 struct resource_list *rl = &atdev->lg_resources;
181 int retval = 0;
182
183 if (SLIST_FIRST(rl) || atdev->lg_pcibus != -1)
184 retval += printf(" at");
185
186 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
187 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
188 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
189
190 return retval;
191 }
192
193 static int
194 legacy_print_child(device_t bus, device_t child)
195 {
196 struct legacy_device *atdev = DEVTOAT(child);
197 int retval = 0;
198
199 retval += bus_print_child_header(bus, child);
200 retval += legacy_print_all_resources(child);
201 if (atdev->lg_pcibus != -1)
202 retval += printf(" pcibus %d", atdev->lg_pcibus);
203 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
204
205 return (retval);
206 }
207
208 static device_t
209 legacy_add_child(device_t bus, int order, const char *name, int unit)
210 {
211 device_t child;
212 struct legacy_device *atdev;
213
214 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
215 M_NOWAIT | M_ZERO);
216 if (!atdev)
217 return(0);
218 resource_list_init(&atdev->lg_resources);
219 atdev->lg_pcibus = -1;
220
221 child = device_add_child_ordered(bus, order, name, unit);
222
223 /* should we free this in legacy_child_detached? */
224 device_set_ivars(child, atdev);
225
226 return(child);
227 }
228
229 static int
230 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
231 {
232 struct legacy_device *atdev = DEVTOAT(child);
233
234 switch (which) {
235 case LEGACY_IVAR_PCIBUS:
236 *result = atdev->lg_pcibus;
237 break;
238 default:
239 return ENOENT;
240 }
241 return 0;
242 }
243
244
245 static int
246 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
247 {
248 struct legacy_device *atdev = DEVTOAT(child);
249
250 switch (which) {
251 case LEGACY_IVAR_PCIBUS:
252 atdev->lg_pcibus = value;
253 break;
254 default:
255 return ENOENT;
256 }
257 return 0;
258 }
259
260
261 static struct resource *
262 legacy_alloc_resource(device_t bus, device_t child, int type, int *rid,
263 u_long start, u_long end, u_long count, u_int flags)
264 {
265 struct legacy_device *atdev = DEVTOAT(child);
266 struct resource_list *rl = &atdev->lg_resources;
267
268 return (resource_list_alloc(rl, bus, child, type, rid, start, end,
269 count, flags));
270 }
271
272 static int
273 legacy_release_resource(device_t bus, device_t child, int type, int rid,
274 struct resource *r)
275 {
276 struct legacy_device *atdev = DEVTOAT(child);
277 struct resource_list *rl = &atdev->lg_resources;
278
279 return (resource_list_release(rl, bus, child, type, rid, r));
280 }
281
282 static int
283 legacy_set_resource(device_t dev, device_t child, int type, int rid,
284 u_long start, u_long count)
285 {
286 struct legacy_device *atdev = DEVTOAT(child);
287 struct resource_list *rl = &atdev->lg_resources;
288
289 resource_list_add(rl, type, rid, start, start + count - 1, count);
290 return(0);
291 }
292
293 static int
294 legacy_get_resource(device_t dev, device_t child, int type, int rid,
295 u_long *startp, u_long *countp)
296 {
297 struct legacy_device *atdev = DEVTOAT(child);
298 struct resource_list *rl = &atdev->lg_resources;
299 struct resource_list_entry *rle;
300
301 rle = resource_list_find(rl, type, rid);
302 if (!rle)
303 return(ENOENT);
304 if (startp)
305 *startp = rle->start;
306 if (countp)
307 *countp = rle->count;
308 return(0);
309 }
310
311 static void
312 legacy_delete_resource(device_t dev, device_t child, int type, int rid)
313 {
314 struct legacy_device *atdev = DEVTOAT(child);
315 struct resource_list *rl = &atdev->lg_resources;
316
317 resource_list_delete(rl, type, rid);
318 }
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