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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/5.2/sys/i386/i386/legacy.c 119452 2003-08-25 09:48:48Z obrien $");
32
33 /*
34 * This code implements a system driver for legacy systems that do not
35 * support ACPI or when ACPI support is not present in the kernel.
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/bus.h>
41 #include <sys/kernel.h>
42 #include <sys/malloc.h>
43 #include <machine/bus.h>
44 #include <sys/rman.h>
45
46 #include "opt_mca.h"
47 #ifdef DEV_MCA
48 #include <i386/bios/mca_machdep.h>
49 #endif
50
51 #include <machine/legacyvar.h>
52 #include <machine/resource.h>
53
54 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
55 struct legacy_device {
56 struct resource_list lg_resources;
57 int lg_pcibus;
58 };
59
60 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
61
62 static void legacy_identify(driver_t *driver, device_t parent);
63 static int legacy_probe(device_t);
64 static int legacy_attach(device_t);
65 static int legacy_print_child(device_t, device_t);
66 static device_t legacy_add_child(device_t bus, int order, const char *name,
67 int unit);
68 static struct resource *legacy_alloc_resource(device_t, device_t, int, int *,
69 u_long, u_long, u_long, u_int);
70 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
71 static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
72 static int legacy_release_resource(device_t, device_t, int, int,
73 struct resource *);
74 static int legacy_set_resource(device_t, device_t, int, int, u_long, u_long);
75 static int legacy_get_resource(device_t, device_t, int, int, u_long *, u_long *);
76 static void legacy_delete_resource(device_t, device_t, int, int);
77
78 static device_method_t legacy_methods[] = {
79 /* Device interface */
80 DEVMETHOD(device_identify, legacy_identify),
81 DEVMETHOD(device_probe, legacy_probe),
82 DEVMETHOD(device_attach, legacy_attach),
83 DEVMETHOD(device_detach, bus_generic_detach),
84 DEVMETHOD(device_shutdown, bus_generic_shutdown),
85 DEVMETHOD(device_suspend, bus_generic_suspend),
86 DEVMETHOD(device_resume, bus_generic_resume),
87
88 /* Bus interface */
89 DEVMETHOD(bus_print_child, legacy_print_child),
90 DEVMETHOD(bus_add_child, legacy_add_child),
91 DEVMETHOD(bus_read_ivar, legacy_read_ivar),
92 DEVMETHOD(bus_write_ivar, legacy_write_ivar),
93 DEVMETHOD(bus_set_resource, legacy_set_resource),
94 DEVMETHOD(bus_get_resource, legacy_get_resource),
95 DEVMETHOD(bus_alloc_resource, legacy_alloc_resource),
96 DEVMETHOD(bus_release_resource, legacy_release_resource),
97 DEVMETHOD(bus_delete_resource, legacy_delete_resource),
98 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
99 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
100 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
101 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
102
103 { 0, 0 }
104 };
105
106 static driver_t legacy_driver = {
107 "legacy",
108 legacy_methods,
109 1, /* no softc */
110 };
111 static devclass_t legacy_devclass;
112
113 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
114
115 static void
116 legacy_identify(driver_t *driver, device_t parent)
117 {
118
119 /*
120 * Add child device with order of 1 so it gets probed
121 * after ACPI (which is at order 0.
122 */
123 if (BUS_ADD_CHILD(parent, 1, "legacy", 0) == NULL)
124 panic("legacy: could not attach");
125 }
126
127 static int
128 legacy_probe(device_t dev)
129 {
130 device_t acpi;
131
132 /*
133 * Fail to probe if ACPI is ok.
134 */
135 acpi = devclass_get_device(devclass_find("acpi"), 0);
136 if (acpi != NULL && device_is_alive(acpi))
137 return (ENXIO);
138 device_set_desc(dev, "legacy system");
139 device_quiet(dev);
140 return (0);
141 }
142
143 static int
144 legacy_attach(device_t dev)
145 {
146 device_t child;
147
148 /*
149 * First, let our child driver's identify any child devices that
150 * they can find. Once that is done attach any devices that we
151 * found.
152 */
153 bus_generic_probe(dev);
154 bus_generic_attach(dev);
155
156 /*
157 * If we didn't see EISA or ISA on a pci bridge, create some
158 * connection points now so they show up "on motherboard".
159 */
160 if (!devclass_get_device(devclass_find("eisa"), 0)) {
161 child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
162 if (child == NULL)
163 panic("legacy_attach eisa");
164 device_probe_and_attach(child);
165 }
166 #ifdef DEV_MCA
167 if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
168 child = BUS_ADD_CHILD(dev, 0, "mca", 0);
169 if (child == 0)
170 panic("legacy_probe mca");
171 device_probe_and_attach(child);
172 }
173 #endif
174 if (!devclass_get_device(devclass_find("isa"), 0)) {
175 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
176 if (child == NULL)
177 panic("legacy_attach isa");
178 device_probe_and_attach(child);
179 }
180
181 return 0;
182 }
183
184 static int
185 legacy_print_all_resources(device_t dev)
186 {
187 struct legacy_device *atdev = DEVTOAT(dev);
188 struct resource_list *rl = &atdev->lg_resources;
189 int retval = 0;
190
191 if (SLIST_FIRST(rl) || atdev->lg_pcibus != -1)
192 retval += printf(" at");
193
194 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
195 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
196 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
197
198 return retval;
199 }
200
201 static int
202 legacy_print_child(device_t bus, device_t child)
203 {
204 struct legacy_device *atdev = DEVTOAT(child);
205 int retval = 0;
206
207 retval += bus_print_child_header(bus, child);
208 retval += legacy_print_all_resources(child);
209 if (atdev->lg_pcibus != -1)
210 retval += printf(" pcibus %d", atdev->lg_pcibus);
211 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
212
213 return (retval);
214 }
215
216 static device_t
217 legacy_add_child(device_t bus, int order, const char *name, int unit)
218 {
219 device_t child;
220 struct legacy_device *atdev;
221
222 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
223 M_NOWAIT | M_ZERO);
224 if (!atdev)
225 return(0);
226 resource_list_init(&atdev->lg_resources);
227 atdev->lg_pcibus = -1;
228
229 child = device_add_child_ordered(bus, order, name, unit);
230
231 /* should we free this in legacy_child_detached? */
232 device_set_ivars(child, atdev);
233
234 return(child);
235 }
236
237 static int
238 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
239 {
240 struct legacy_device *atdev = DEVTOAT(child);
241
242 switch (which) {
243 case LEGACY_IVAR_PCIBUS:
244 *result = atdev->lg_pcibus;
245 break;
246 default:
247 return ENOENT;
248 }
249 return 0;
250 }
251
252
253 static int
254 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
255 {
256 struct legacy_device *atdev = DEVTOAT(child);
257
258 switch (which) {
259 case LEGACY_IVAR_PCIBUS:
260 atdev->lg_pcibus = value;
261 break;
262 default:
263 return ENOENT;
264 }
265 return 0;
266 }
267
268
269 static struct resource *
270 legacy_alloc_resource(device_t bus, device_t child, int type, int *rid,
271 u_long start, u_long end, u_long count, u_int flags)
272 {
273 struct legacy_device *atdev = DEVTOAT(child);
274 struct resource_list *rl = &atdev->lg_resources;
275
276 return (resource_list_alloc(rl, bus, child, type, rid, start, end,
277 count, flags));
278 }
279
280 static int
281 legacy_release_resource(device_t bus, device_t child, int type, int rid,
282 struct resource *r)
283 {
284 struct legacy_device *atdev = DEVTOAT(child);
285 struct resource_list *rl = &atdev->lg_resources;
286
287 return (resource_list_release(rl, bus, child, type, rid, r));
288 }
289
290 static int
291 legacy_set_resource(device_t dev, device_t child, int type, int rid,
292 u_long start, u_long count)
293 {
294 struct legacy_device *atdev = DEVTOAT(child);
295 struct resource_list *rl = &atdev->lg_resources;
296
297 resource_list_add(rl, type, rid, start, start + count - 1, count);
298 return(0);
299 }
300
301 static int
302 legacy_get_resource(device_t dev, device_t child, int type, int rid,
303 u_long *startp, u_long *countp)
304 {
305 struct legacy_device *atdev = DEVTOAT(child);
306 struct resource_list *rl = &atdev->lg_resources;
307 struct resource_list_entry *rle;
308
309 rle = resource_list_find(rl, type, rid);
310 if (!rle)
311 return(ENOENT);
312 if (startp)
313 *startp = rle->start;
314 if (countp)
315 *countp = rle->count;
316 return(0);
317 }
318
319 static void
320 legacy_delete_resource(device_t dev, device_t child, int type, int rid)
321 {
322 struct legacy_device *atdev = DEVTOAT(child);
323 struct resource_list *rl = &atdev->lg_resources;
324
325 resource_list_delete(rl, type, rid);
326 }
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